🐧 cannot overwrite specific file types on smb shares

thought someone here may have an idea wtf is going on... Using Flame 2023 on Centos7 and Rocky 8, both exhibit same behaviour. If I export a .mov or .mxf video file to a fstab mounted cifs share, and then attempt to overwrite that file with another export, it get's locked with 'you don't have permission' error, if I attempt to delete the file, get 'does not exist' error...

This only happens with smb shares, the posix permissions and ACLs are correct. Also tried disabling smb caching thinking it may be an op lock issue. The issue doesn't occur when re-exporting image sequences, only video files. Even if I go into terminal and manually try to remove a file with rm that is clearly there as sudo, get error 'file does not exist' even when Im staring right at it!

Writing and reading files from smb shares works fine, the only part that doesn't work is specifically overwriting video files on export. WTF is going on?