Building geometry/deleting certain geometry crashes editor

I have certain BSP geometry in my scene that when I move/delete or alter in any way crash the entire editor. It’s really weird because this behavior popped up completely out of nowhere. Here’s the crash report:

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000038

UnrealEditor_BSPUtils
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_Engine
UnrealEditor_CoreUObject
UnrealEditor_DetailCustomizations
UnrealEditor_DetailCustomizations
UnrealEditor_DetailCustomizations
UnrealEditor_PropertyEditor
UnrealEditor_PropertyEditor
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
user32
user32
InkObj
atlthunk
user32
user32
UnrealEditor_ApplicationCore
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

When I relaunch the editor it pops up with this too:

image

Rebuilding it just crashes the editor again with the same error log.

When I go to see which levels need a geometry rebuild it says:

image

Any help would be greatly appreciated, I don’t know why this started happening all of a sudden!