Mp4 exports freezing since the laste update on extrenal server

Hello,
Since the last update, we have an export problem on our external server.
Each time we export, the image freezes at a few seconds from the end but the playback continues.
It also happens that the sound cuts off. Exports from the computer are working, it's mainly exports to external server.

Did you hear about this problem after the last update and maybe someone knows how to resolve that?

Thank you in advance!