Libraries not syncing despite plex-sync appearing to work correctly. Could docker be an issue?

[CraftyClown]

Hi folks, not sure if this is still being maintained as there has been no activity for about a year, however thought I'd ask on the off-chance.

I'm using plex-sync and it appears to run properly, ie; I see the green bars appear as the scan progresses and there is a sync completed message at the end, however the libraries to not show any changes.

I am not getting any error messages

One of the servers is in a docker container, could this be an issue?