Sonarr not seeing files to import

Version

3.0.4.1003

Package Version

3.0.4 by Team Sonarr

Mono Version

5.18.0.240

OS: debian buster
Debug logs:
debug:
https://hastebin.com/sepeneteho.yaml

Description of issue:
i can see the folder it downloads to, and the file, with ls -al, running as the sonarr user that the service runs under, but sonarr insists it cannot see/access it. i chmodded the folders with 777, and there is not issues with the CIFS share permissions, as i verified they were set correctly (and radarr, which uses the same group, has no issues)
it was working fine until today.

thinking it may just be a bad filename. i imported another release of the episode fineā€¦