There seems to be a comment display bug concerning collections with "sub jobs" (you have to switch from sub job to sub job, but it's one big block only separated by lines and it's counted as one job). As soon as you switch to any other than the first sub job, the comments are hidden (the comment section is still present, just empty).
Confirmed on two browsers/devices.
Already reported it to support, but thought this might be interesting for other translators as well, as it had me stumped for a while and I recently lost a comment I started writing because I thought the only way to get the comment section back was by reloading the page. So simply changing back to the first sub job makes the comments reappear.