Hello Euan, Sorry for delay - busy with the aforementioned 5.5 move and other work.
I can’t see the asset name in the given minidumps. The latest minidump is telling me that the this pointer of the FAnimSync in the frame is null (That is to say Sync.TickAssetPlayerInstances() is calling it a Sync variable that is null); but it’s getting so far into the function that this doesn’t make sense. I think for both prior reasons I will need to try catch it with a better crash dump or in a debugger.
So far I do not have any reports of the issue in 5.5, but it may be just a matter of time. I’ll try update soon when I know more.