Problem entering Passcode

Since upgrading to IOS 12.4 I try to log in with my passcode and keep getting locked out because when I move my finger over the screen to hear the number that I require and then I used to just double tap anywhere on the screen and the number I wanted goes in and the cursoe rmoves to the next box again I move to the hear the number I need and again once I hear that I used to just single finger double tap anywhere in the screen and the number went in, exactly the same method I use when typing, hear the letter nad then just single finger double tap anywhere on the screen.

Now what is happening on log in is I hear the number and when I single finger double tap anywhere on the screen it does two clicks and enters two digits but these do not relate to what I heard but where I randomly tap, and I get locked out. so it seems that the log in screen is causing me the problem as it seems the only way I can log in is to hear the number and must then hit that exact button number with my double tap, this is where I get messed up as I do not seem to be able to hit that button exactly and go off target, any thoughts?