Objects disappear

Hello,

I reasantly updated to 3.4 and my scene which ran fine before update now has some strange problems.

Some of my objects dissapear when i run. There seems to be nothing wrong with them when i inspect them, they just isnt rendered.
When i deactivate them and reactivate them, they reappear in the scene with no visible differences in the inspector.

I get a lot of errors in the log:

!IsFinite(outDistanceForSort)
parent->m_HasCachedTranformMatrix
node.m_Bounds.IsValid()

I use occlusion culling and that dont seem to work anymore since my fps drop way down.

This guy seems to have had a similar problem:

But no answer here. He solved it but didnt share.

Anyone know anything about how to solve this?

Thanks

I managed to solve this now.

My proboem was with two of my meshes which had way to deep parent-child relations with up to 100ds of children. Making the hiearchy flat solved it.

Im not sure why this worked ok before and not now, but i dont se why the mesh was built like that from start.