Garmin Express overwriting case sensitive properties

"Found" a new problem.
I have some properties with the same id name in my properties.xml that are a single lowercase letter or an single uppercase letter. e.g: ("m"/"M", "x"/"X")

If I now open the watchface settings with Garmin Express, the propertiy with the lower case letter is overwritten with the value of the upper case letter property. It does not even have to be saved beforehand.
This only happens with Garmin Express, everything works perfectly with the ConnectIQ app.
Garmin Express Version 7.20.3.0
OS: Windows 11
SDK 7.1.1 (although I'm sure it didn't work with 7.1.0 either / Edit: Tested with a 6.4.2 compiled watchface - same problem after saving)
Tested with the following devices: descentmk2, Epix Pro 47mm (16.22)

The whole thing is a bit of a disaster in my case - has anyone else experienced these problems?
Since it is certainly reproducible, I have already created a bug report:
forums.garmin.com/.../garmin-express-overwriting-case-sensitive-properties

0 jim_m_58 14 days ago

I seem to recall this back from when app-settings were first introduced back in 2015-2016. Since then I just never assume that property keys are case sensitive.

I've gotten in the habit were all my property keys are lower case.

0 TitanicTurtle 14 days ago in reply to jim_m_58

So far, everything has always worked as intended, and with the ConnectIQ app everything continues to work as usual.
Only a newer version of Garmin Express seems to be affected.
I have added some videos in the bug report that show the problem.

0 _psx_ 14 days ago

I had another problem... Using the same id for strings/rez and property sometimes make problems with settings and/or app, so simple avoid it.