While logged in visit
https://en.m.wikipedia.org/wiki/Zelkova_serrata
Press Talk.
We are thrown into the first thread with no way to make a second thread.
All we can do is comment on the first thread or leave the talk page. Pushing the arrow at top just takes us out of the talk page.
See https://en.wikipedia.org/w/index.php?title=Talk:Zelkova_serrata&oldid=895899375 for the permanent version, where the first item has an empty heading.