Update, after working for a while, the white bar is back. I'm not sure
why PTC seemed to resolve my issue for a while, but unfortunately it
didn't stick. Fyte's work around is working for me now, hopefully that
remains more persistent.
I was able to get rid of the issue simply by updating to PTC. It's weird
though, the update it pushed says Version 34.0 (note 34.0 was already
installed from release channel). Is it possible that there is a new fix
on PTC that might address this issu...