Like some people reported, I also experienced the input issue on progear (at least I really noticed it on this one), very often, at some specific point in the stage 1, I get up that is blocked.
Because it looked like it was happening at specific spots, I thought this was related to the core itself. But before coming here and reading the last few messages, it's the first time I read some people facing that very same issue. I did not hear of read anything from other users about this. So maybe this is something with the expander?