Cap-on button stays on
My iPhone 8 stays on Caps when the Uppercase button is pressed. Usually it would capitalize only the first letter but now it acts like it’s been double- tapped to capitalize the entire sentence.
after searching on google I saw some posts regarding the same issue, some guys saying that they had this issue and it got fixed by having auto-capitalization on, caps lock on and the '. ' tap space feature off and it works the way you expect it to, I’m not sure about it but you can give it a try.