UPDATE!
The 4.17.2 Hotfix is now live! This hotfix includes over 100 important fixes in the 4.17 release, including many improvements to stability.
Fixed in 4.17.2
Fixed! UE-49456 [CrashReport] Commandlet crash - UE4Editor_Engine!FAnimationUtils::CompressAnimSequenceExplicit() [animationutils.cpp:621]
Fixed! UE-49275 checkSlow hit when running a post process instance without a main instance
Fixed! UE-48962 [CrashReport] UE4Editor_Engine!FAnimNotifyEvent::IsBranchingPoint() [animtypes.cpp:86]
Fixed! UE-48725 [CrashReport] UE4Editor_Engine!UAnimSequenceBase::GetAnimationPose() [animsequencebase.h:148]
Fixed! UE-48405 [CrashReport] UE4Editor_Persona!<lambda_e529d88d0657fbede17be1535bc6d479>: Operator() [blendspacedetails.cpp:29]
Fixed! UE-49673 Project does not cook with actors containing ModularSynth component
Fixed! UE-49538 Incorrect parameter lerping in audio mixer
Fixed! UE-48602 iOS AudioMixer crashes when hardware buffer size changes and when application suspends.
Fixed! UE-47763 Crash in Audio Mixer when baking propagation on a Phonon source without an audio component - AActor::GetComponentByClass()
Fixed! UE-49982 Linux server - Severe lag and high ping during regular gameplay
Fixed! UE-48973 [CrashReport] UE4Editor_DetailCustomizations!FBodyInstanceCustomization::MarkAllBodiesDefaultCollision() [bodyinstancecustomization.cpp:829]
Fixed! UE-47474 [CrashReport] PhysX3PROFILE_x64!physx::Sc::BodySim::activateInteractions() [scbodysim.cpp:496]
Fixed! UE-49179 No error message displayed if a plugin required by a project is missing
Fixed! UE-48555 Crash issues with async loading thread enabled
Fixed! UE-48402 [CrashReport] UE4Editor_Core!FName::GetDisplayNameEntry() [unrealnames.cpp:894]
Fixed! UE-48376 Regression: cooked content can no longer be opened in the editor even if AllowCookedDataInEditorBuilds is True.
Fixed! UE-48297 [CrashReport] UE4Editor_Core!FStatsThreadState::ScanForAdvance() [statsdata.cpp:732]
Fixed! UE-48274 [CrashReport] UE4Editor_Core!FModuleManager::LoadModuleChecked() [modulemanager.cpp:350]
Fixed! UE-48137 GitHub 3870 : Fix Windows build of 4.17.0
Fixed! UE-47668 [CrashReport] UE4Editor_CoreUObject!FCompressedChunk::FCompressedChunk()
Fixed! UE-46195 Assertion Failure in QA Game TM-VRSmoke on Oculus
Fixed! UE-48192 GitHub 3879 : fix bug when creating a new VS2017 C++ project
Fixed! UE-48509 Crashes using incremental cook with older cooked data
Fixed! UE-48964 VS2017 /permissive- option should not be enabled by default
Fixed! UE-48232 UBT throws an exception if a plugin lists a module twice
Fixed! UE-49271 Foliage: Having only 1 instance will result in sending garbage to the GPU in a second VB buffer
Fixed! UE-49019 Foliage disappears after 1.5k if occlusion culling project setting is disabled
Fixed! UE-48955 Navigation do not match generated StaticMesh instances
Fixed! UE-48728 [CrashReport] UE4Editor_Engine!AActor::IncrementalRegisterComponents() [actor.cpp:4065]
Fixed! UE-48327 AInstancedFoliageActor crashes when postload when having DiscardDataOnLoad set to 1 when having a not used foliage in a map
Fixed! UE-45854 [CrashReport] UE4Editor_Engine!UHierarchicalInstancedStaticMeshComponent::BuildTreeIfOutdated
Fixed! UE-49189 Function boolean return nodes often set to true will default to false once saved project is closed/reopened
Fixed! UE-48815 Changing Asset Manager Bundle state of two assets at once does not correctly free old bundle
Fixed! UE-48413 Crash running dedicated server with fixed framerate
Fixed! UE-48228 Instanced Static Mesh components that are part of a Blueprint aren’t visible in Standalone Game
Fixed! UE-47948 Error when Compiling an AIController Blueprint Class with an AIPerception Component
Fixed! UE-49756 [CrashReport] UEdGraphSchema_K2::PinHasSplittableStructType
Fixed! UE-49749 FSplinePoint members not exposed to blueprints
Fixed! UE-49596 Editor crash on blueprint compile that contains edited BP Struct
Fixed! UE-49513 [CrashReport] Assertion failed: !PinRef->bWasTrashed - UEdGraphPin::SerializePin()
Fixed! UE-49447 [CrashReport] UEdGraphPin::Modify - UEdGraphSchema_K2::RecombinePin
Fixed! UE-49398 GitHub 3986 : Validate child BPs before renaming component
Fixed! UE-49196 Return values are not saved in blueprint functions
Fixed! UE-49009 Blueprint needs to be compiled if another blueprint sharing an interface is compiled
Fixed! UE-49005 [CrashReport] Assertion failed: !PinRef->bWasTrashed | UEdGraphPin::SerializePin()
Fixed! UE-48999 [CrashReport] UE4Editor_Engine!FBlueprintDebugData::FindBreakpointInjectionSites() [blueprintgeneratedclass.h:382]
Fixed! UE-48977 PostProcessSettings no longer has the Post Process Materials option
Fixed! UE-48976 [CrashReport] UE4Editor_UnrealEd!FBlueprintEditorUtils::FindBlueprintForGraphChecked() [blueprinteditorutils.cpp:2206]
Fixed! UE-48974 [CrashReport] UE4Editor_Engine!UEdGraphPin::Modify() [edgraphpin.cpp:619]
Fixed! UE-48970 [CrashReport] UE4Editor_BlueprintGraph!UK2Node_VariableGet::IsValidTypeForNonPure() [k2node_variableget.cpp:323]
Fixed! UE-48697 Event tick not firing when in an actor component that is added to an actor
Fixed! UE-48672 Level cannot save when compile setting is changed on blueprint present in level
Fixed! UE-48466 Actor reference in a struct is replaced by an object reference when saving a struct
Fixed! UE-48386 Custom event parameter set to 0 by default
Fixed! UE-47678 Crash in Blueprint when clicking on Component variable name that remains after Component was deleted
Fixed! UE-49735 Error compiling blueprint using interface after changing function parameters
Fixed! UE-49440 Crash when nativizing blueprint containing MakeMap or MakeSet node
Fixed! UE-48524 Ensure compiling a blueprint with itself as a Child Actor Component
Fixed! UE-48465 Reinstancer’s CPFUO call clears bCanEverTick flag for Blueprint component template
Fixed! UE-48464 WorldContextObject is null in BP function library
Fixed! UE-48250 Actor Component instances have their settings reset to default when compiled in 4.17 (Compilation Manager)
Fixed! UE-47991 Strange crash occurring from project When upgrading from 4.16 to 4.17
Fixed! UE-49634 Crash undoing member removal from user defined struct
Fixed! UE-48430 [CrashReport] UE4Editor_Kismet!FBlueprintEditorToolbar::GetStatusImage() [sblueprinteditortoolbar.cpp:669]
Fixed! UE-47467 [CrashReport] UE4Editor_Kismet!FBlueprintGlobalOptionsDetails::CanDeprecateBlueprint() [blueprintdetailscustomization.cpp:5127]
Fixed! UE-48995 [CrashReport] UE4Editor_Engine!USceneComponent::UpdateComponentToWorldWithParent() [scenecomponent.cpp:492]
Fixed! UE-48897 Crash when moving actor on viewport with HierarchicalInstancedStaticMeshComponent.
Fixed! UE-47523 Undoing pasting a component will crash ([CrashReport] UE4Editor_CoreUObject!FWeakObjectPtr::IsValid() [weakobjectptr.cpp:48])
Fixed! UE-48914 UHierarchicalInstancedStaticMeshComponent::GetOverlappingSphereCount crash when using grass
Fixed! UE-48724 [CrashReport] UE4Editor_Landscape!ULandscapeInfo::UpdateLayerInfoMap() [landscape.cpp:1459]
Fixed! UE-48484 Grass updates cause checkout
Fixed! UE-48035 Crash when foliage painting in QAGame with TallGrass_01 asset
Fixed! UE-47492 [CrashReport] Access violation - FLandscapeEditDataInterface::SetAlphaData()
Fixed! UE-47253 [CrashReport] UE4Editor_Landscape!ALandscapeProxy::CreateLandscapeInfo() [landscape.cpp:752]
Fixed! UE-50163 AppleARKit does not include correct device capabilities in plist
Fixed! UE-50162 Marketing Icon is missing when uploaded to app store
Fixed! UE-49737 Xcode 9 GM build failures in 4.17
Fixed! UE-49721 GEARVR - .bat installs failing due to permissions when releasing for distribution
Fixed! UE-49694 Saved Data lost going from 4.16 to 4.17
Fixed! UE-49629 Problems with Android virtual keyboard input for UMG textedit set as password
Fixed! UE-49622 Zen Garden HTML5 build does not render on Chrome on OS X
Fixed! UE-49308 Volume change enters immersive mode on Android even if not enabled
Fixed! UE-49305 Packaging not stopping for Android when error is found
Fixed! UE-48714 Android applications using AudioMixer continue to play audio when the application enters the background
Fixed! UE-48678 package.xml in Engine/Source/ThirdParty/Android needs to be binary in github
Fixed! UE-48323 Protostar leads to device reboot in Galaxy S7 Adreno device. (SM-G930V)
Fixed! UE-47750 Android movie player doesn’t work with ES 3.1
Fixed! UE-46409 [CrashReport] Assertion on: Could not create a libwebsocket - FNetworkFileServerHttp::Init()
Fixed! UE-50164 AppleARKit plugin does not build against Xcode 9 release
Fixed! UE-45947 Character Mesh Position Offset in Online Sessions
Fixed! UE-48340 PerInstanceRandom does not work on Instanced Static Meshes spawned at runtime
Fixed! UE-48670 Crash when pasting transform in Sequencer
Fixed! UE-48490 Crash upgrading a UMG project
Fixed! UE-48487 [CrashReport] UE4Editor_SlateCore!TWeakPtr<SWidget,0>::Pin() [sharedpointer.h:1120]
Fixed! UE-48443 [CrashReport] UE4Editor_UnrealEd!TSet<FEditorUndoClient * __ptr64,DefaultKeyFuncs<FEditorUndoClient * __ptr64,0>,FDefaultSetAllocator>::Remove() [set.h:685]
Fixed! UE-48383 [CrashReport] UE4Editor_UMG!CastChecked<UUserWidget,UObject>
Fixed! UE-48367 When dragging a skeletal animation section in time, the pose reverts temporarily
Fixed! UE-47341 Blending between two animation sometimes doesnt play the second animation
Fixed! UE-49765 Linux ARM server fails to run due to memory allocation error
Fixed! UE-47721 Server links to additional CEF libraries when WebBrowserWidget plugin is enabled
Fixed! UE-47558 [CrashReport] Linux crash - llvm::TargetLowering::LowerCallTo()
Fixed! UE-46181 [CrashReport] Crash on Linux - llvm::MachineFunctionPass::runOnFunction()
Fixed! UE-46177 [CrashReport] Assertion failed on Linux: SharedContext.hGLContext in OpenGLLinux.cpp
Fixed! UE-49414 Crash when editing static arrays in BP defaults
Fixed! UE-49348 “+Create Binding” added to a “Text Block” makes the Text not visible in Standalone Game
Fixed! UE-49635 Linux: Failure to build LinuxServer on Windows: Member access into incomplete type ‘vr::RenderModel_t’
Fixed! UE-49791 Moving the IPD slider on a Rift causes the screen to go black
Fixed! UE-49017 SteamVR: Hidden and Visible Area Mesh optimizations don’t work in 4.17 because of CRC checksum failures
Fixed! UE-48528 Motion controllers snap to the origin when position tracking is lost
Fixed! UE-48283 If a controller is not positional tracked anymore (outside of tracker boundaries), its position will be returned to 0/0/0
REMEMBER: Please report any new bugs you find by following the How To Report a Bug Guide