Alembic File Desappear from some camera angle


I have troubles with some Alembic files (Skeletal).

Since few days, Alembic files doesn’t work fine anymore. I can’t explain why, I’m lost : /

I made 2 screens shot for the typical troubles taht I have, Alembic object desappear from some camera angle.

Last week, I had this trouble with 3 alembic files, I not used import to make them working, I imported .uasset from another project.

I need help, please

I understand why objects desappera : The bounds are bad ! How to fix, adjust bounds with UE4 ?