ToonBoomTempDir consuming 300+GB

I’m running into an issue with Harmony Premium 17 running on Windows 10 in offline mode.
As part of our workflow we have people who open and check harmony projects, probably at least 100 a day. We’ve had this same workflow for years but for some reason starting yesterday the directory C:\Users\Username\AppData\Local\Temp\ToonBoomTempDir\ is grabbing any and all available disk space until it fills up the drive.

I’ve been able to just delete this directory when the drive is full, but it seems strange that this is happening at all.
I have recently uninstalled and reinstalled TBH to no success.
Has anyone else encountered something like this?