Hello, @ESanders (WMF) and others, please try to reply to any comment in the Hana Krampolová section. I cannot reply in that section. Then scroll down and try reply to any comment in sections Rajlichova hypotéza or Seznam německých dokumentárních cyklů. I can reply there. I tried it in Chrome, Windows 7. Where is the problem?
Topic on Talk:Talk pages project/Replying/Flow
This looks like a bug in Parsoid to me. I filed a task with some initial investigation: T260550.
Thanks a lot, I am not very good in tasks at Phabricator.