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?
I always use desktop version on my mobile,because it's really really better than mobile version
Yeah even I had the same problem once. It's impossible to see someone's submission in a contest because doubling tapping the cell actually zooms in or out. At least this thing should be improved.
Woah! They have changed this thing, now you just need to tap it once.
I use Codeforces on mobile quite often and it's reasonable. The issue with viewing submissions sometimes occurs on the desktop site as well, it might not be specific to mobile site.
On a related note, my cell phone turns to grayscale in the evening. It's nice not to be biased by handle colour once in a while :)