Version switcher arrows missing

Edited-message version controls disappeared from my chats. I used to see 1/2, 2/2, or 1/5 beside edited messages, but now only copy/share/edit icons appear. A long creative writing branch appears inaccessible or overwritten. Please i dont know whether this is a UI regression and whether my previous edited branches can be restored or exposed again. i lost an entire story i was making because of this.