My M's are behaving badly on all cap font

I am having trouble with one character on an all-cap font.
Cap M works
The lower case doesn’t.
I have created double codes for all the alphabet; the only one not displaying correctly is the m.
Please see attached.
Screen Shot 2022-08-09 at 6.25.03 PM
Screen Shot 2022-08-09 at 6.28.28 PM

Any help for a simple fix would be gratefully accepted.

Why do you have an empty ‘m’ (lowercase)?

This is the question I need answers to. All my characters have a double code. except for the m.
I did delete all the lower case and selected the upper case and updated the font info.
Screen Shot 2022-08-10 at 8.02.01 AM

Just remove the “m” (lowercase) and update glyph info for the “M” (uppercase) again.