I've found a repeatable bug with the turn-tracker window not closing (or being able to be closed) on player side. Steps:
1. Open turn tracker on GM side with no tokens on map. Turn tracker window opens on both GM side and player side, with the explanation that there are no tokens and to close it.
2. If you ONLY hit the blue X, windows on GM and Player sides both close as expected.
4. If, however, you hit the arrow on the GM side before hitting the blue X, the GM-side window closes, but the player window does not, and is not closable (no controls are present to do so - it's stuck on screen).
Thanks,
Chris