Creating Lat/Lon masks, portions of the input disappear when editing an earlier portion

[foosbar]

Describe the bug
The same code works great for imask (6.6.3) but behaves oddly for imask 7.x. I'm attempting to create a latitude input box that accepts DDM version of latitude.

To Reproduce
Visit Codepen to see a working example

To reproduce, focus on the input field and type 123456789N. It should look like 12° 34.5678' N
Now, select any of the numbers and type a new number. The direction (N) will disappear. With IMASK 6.6.3, the N does NOT disappear with the same code.

Expected behavior
I would expect the portion of the string not being changed to remain intact

Environment:

• OS: macOS Sonoma 14.6
• Browser All including safari 17.5 and Chrome 127
• Version [e.g. 22]
• IMask: 7.6.1
• Framework/plugin: React 18.3.1