So I've had this happen numerous times to numerous X30/X50s over the last couple of days that are running version 3.1.3-220008 and the "fix" that I have found is to leave it in it's unlicensed state and update it to version 3.2.3-280012 and upon rebooting it will regain it's Zoom Room activation. I've done this to two different X50s this AM and it's worked both times.
Now we have to cross our fingers and hope that 3.2.3 doesn't come with more issues.