As has also been documented elsewhere, those of us who haven't been using USB stick have still experienced the issue. That is, for us, pulling the USB stick is *not* a factor.
Don't have the problem so much with channel listings these days (11.5), but problems with the channel listing being sometimes non-responsive continue.
Just have to go back Home and start over - that generally works. But sometimes I have do a hard power-down and wait 30 secs or so and start it back up.
A number of other apparent bugs have increased as the TV gets older - e.g., Amazon app quits in the middle of a program often. Not sure if more current Roku hardware would act any differently. When this particular bug occurs, a hard power-down is apparently the only (temporary) fix, or it will continue happening again.
As I mentioned a long time ago, if you really want to just view off-air channels and don't mind not having filled-in channel listings - or access to any Internet-based apps - just disconnect the network (in my case, pull the ethernet cable). That works every time.
As a side comment: one thing that is really irritating about channel listings is that the TV periodically completely loses "hidden" and "favorite" channels - in which case I have to manually re-create, which is a pain. On re-tuning off-air channels, this *always* happens; but that isn't the only time favorite/hidden channel sets are lost.
Then again, it's free TV. 😉
