There is one thread I'm on, where if I try to scroll down, or flip the thread so that I can read the bits I haven't read, that as soon as I do that, I get bumped off the app.
It goes black then goes to my home screen?! 
Yet the other eleventy million threads I'm on are fine.
It's a thread in Primary Education, nothing too bun-fighty!
WTF is going on?! Thread is still being posted on, but I can't get to the end of the thread either by scrolling down, or by flipping it, to see the posts. It's been doing that since 8.30 this morning!
Give me a sec, and I'll post a link to the thread.