I had been tearing my hair out also so had some time to google it. Thank goodness this post popped up first and disabling that plugin mentioned above, Studio Telemetry, was a bingo moment for me! Anyone else who comes across this I’d defiantly recommend disabling that too first and see how you go.
I developed a game for Android for half a year, updated from 5.2 to 5.3, then to 5.4, 5.4.1,5.4.2 and everything was fine, fps was consistently 60 on lg v50, recently updated to 5.4.3 and fps in the game dropped to 10-15, I didn’t change the settings, that happened in 5.4.3, what destroyed the fps so much? and how can I now roll back to at least 5.4.2? I saw that the RHIT event happened and they started writing 50-60 ms, but before it was around 10 ms.
What has changed a lot in 5.4.3 for Android? my FPS dropped from 60 stable to 0-10pfs. I even created a project with a view from the third line and assembled it for android and 10-20 frames per second in the game, the phone is quite spectacular LG v50. tried r.rhithread.enable=0 does not help, it disables rhit, but then Draw increases from 8 ms to 22 ms, r.RHISetGPUCaptureOptions=1 reduces RHIT from 60 ms to 30 ms, but this is still a lot compared to the 5.4.2, I had RHIT 8-10ms and 60fps. later try adding screenshots to compare with version 5.3. please help me solve this problem or tell me how to roll back to 5.4.2? Thank you
top screenshot 5.4.3 bottom screenshot 5.3.2
all settings are default
disabling Studio Telemetry didn’t help
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I am still having really bad performance in 5.4.3 when running tasks on background threads (on the task graph (global thread pool or custom) or with a custom FRunnable thread). This is even if I skip returning the results to the game thread.
I am running a lot of tasks but this worked fine in previous versions of unreal. I have tried setting thread affinity, task priority and various thread create flags. Some settings works better than other, but there is always interference with the performance of the game thread.
Have I missed something?
I’m on 5.4.4 and have the same problem (No problems with 5.3.2), so unfortunately the bug is still present
Here’s a video which clearly shows the problem: https://youtu.be/U1YjET5txwM
Like @Rawalanche, neither disabling the Studio Telemetry Plugin nor setting r.rhithread.enable 0 fixes the issue for me. r.RHISetGPUCaptureOptions 1 also doesn’t help. Keeping a window like “Project settings” open also didn’t help.
@comlys Suggestion of launching the editor with DerivedDataCacheCommandlet (ie: -run=DerivedDataCache) also made no difference
The only thing that fixes it (for a while, at least) is messing with the “Global Illumination” setting. - See my video for a demonstration.
There’s similar threads on this as well:
Hopefully we get a proper fix for this soon as it appears we’re dealing with a definite regress here
Have you also tried running Insights to verify that it’s caused by UTexture:::ForceRebuildPlatformData? This bug is supposedly fixed already, so it would be appropriate to double check if it’s really the same problem or different problem that has the same symptom.
I’ve updated to UE5.4.4, and the bug is still there with extremely laggy usage. Obviously, the problem has never been solved.
I’m not sure if worked for me, but suddenly all the inconsistency I was having with the StateTree Ai dissapeared and began to work as intended O_O
omg, you saved me, thank you.
I tried everything and finally I upgraded the latest NVIDIA graphics drivers to successfully solve the problem…
didn’t work for me. latest nvidia driver and even UE5.5, same lag. only 5.3 fixes it
I assume it has something to do with the fact that I’m using Windows 11 Insider Dev builds, as there don’t seem to be enough people experiencing/complaining about this ? Any of you using insider builds?
I’m reporting on UE5.4.4 … I had this issue and tried what has been suggested in the comments and nothing worked, what worked for me is I noticed my laptop charger was not connected properly> I make sure it is plugged and charging and suddenly the performance become stable.
So check your power settings, on my side it is a power issue 
The scene originally made in v.5.3 keeps stuttering - the FPS drops cyclically from 50 to 15 and back every second. The same issue persisted even in 5.5. The reason was Sun and Sky plugin. Once I removed the preset Sun_and_Sky element from the scene and replaced it with the light components separately - everything became smooth
cant work
Seems you’re definitely onto something. I made a copy of the BP_SunSky (Sun and Sky Actor), edited it and removed the VolumetricCloud component from it, and boom, the lag was gone. So it seems to have something to do with VolumetricCloud (or at least that component is drastically aggravating whatever else might be wrong). Hope this helps someone, and more importantly, that the bug gets identified and fixed (as it’s still a problem even in UE 5.5.1-38445549)
Similar reports here, which I believe are related to the same issue: Exponential Height Fog Issues with Volumetrics : r/unrealengine
UE has recently made changes/feature enhancements to this component (https://www.youtube.com/watch?v=hjlIsbSiSvI) so it wouldn’t be too surprising if that’s where the bug was introduced
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