Engine Prime cannot add tracks from network share on Windows 10

I added some tracks from folders from a network share on Windows 10, everything was fine… After rebooting all those files showed as red/missing/unavailable despite the network share being mounted.

Deleting those crates and re-adding tracks from those folders shows the progress bar but when the progress bar is complete there are zero tracks in the crate.

I’ve only just downloaded Engine Prime to check it out in anticipation of buying your new Prime 4 controller in March and this is something of a show stopper.

Is there somebody who could look into this bug?