Premiere Pro Beta Loses Non-Docked Panels After Export

Hey all! I found a bug in the current Premiere Pro Beta.

I use multiple monitors so I have panels that are not docked in the main Premiere window. When switching to the Export tab, my non-docked panels disappear. I think this behavior is normal, but after selecting export to Media Encoder, Premiere automatically switches back to the Edit tab, but the panels external to the main window do not come back. I tried closing and opening the missing panels in the Window menu, but doing that crashed the entire program.

In the non-beta version of Premiere the panels do not close when switching to the export tab, and there is no issue with the panels when switching back to the edit tab.