That's a bit weird. I was able to have Tracks unchecked in the Strips drop-down, by pulling the buses all the way to the left, which then removed the check for Tracks in Strips, but when I then clicked on Tracks again, they all popped back into view and the check for Tracks remained. All then is working at my end as expected.
Would you lose work if you closed the project without saving it first, and then opened it again? (in case somehow it got 'confused')
Wish I had more to offer, it's never happened to me, and I don't know how to get into that predicament.
Bob Bone