Let's be honest — mobile version has a lot of bugs. I'm very glad for PC version Codeforces in contrast mobile.
I tried to watch friend's submissions in contest, and I couldn't! Of course I tried to open available submissions, it was certainly bug of mobile version. I tried to click at pluses too long but I didn't get any result. I think Codeforces need better mobile version.
How often do you use mobile codeforces?