Show all comments in Facebook app

[Zoostation]

When I'm using the Facebook app on my S9 I can't see all comments. The drop down menu to show all comments doesn't work. I can select to show all but it only reloads the most relevant every time. Is there a way around this or any known fix? The Facebook forums I've searched don't seem to address anything but the desktop version.

 

[Zoostation]

I was about to post regarding this tonight but thanks to a search realized I posted this about 6 months ago ok nly to get no replies. I initially started having this problem over a year and a half ago with a previous phone (Verizon Galaxy S6)but it has continued through multiple updates and the next phone (unlocked S9). Posting again on this as I tried to post ask a Facebook community question on this through the app, but can't because the choose a topic menu doesn't work (you can't post without choosing a topic). Any suggestions?