Unable to sync iPhones' audio volume controls

TidBITS Talk
1

https://www.reddit.com/r/applehelp/comments/1r42nvq/the_volume_on_my_swipe_down_menu_isnt_matching_my/

I ran into this issue a few times with my old iPhone 12 mini and new 17 with their updated iOS v26. I didn’t have this problem before iOS v26. I have to restart my iPhones to fix it. What about the rest of you?