It doesn't seem to check LqtDispatch on this reply path. Reported by @Ciencia_Al_Poder at T92303#1502810 .
Tested at https://www.mediawiki.org/w/index.php?title=Thread:User_talk:Superm401/Hello!/reply&oldid=1812176
Also on other pages. E.g. https://www.mediawiki.org/wiki/Thread:Project_talk:Language_policy/Migration_list/Status .
When {{#useliquidthreads:1}} is removed from the page, it should look the same but the LQT buttons should not be there.
They should also not be able to reply in Special:NewMessages in this case.