Dot for Lat and Long Coordinates dissappears for RTK Base in 1.3.58 and older versions

When I enter a number for a known RTK Position for the Base and close the MP the dot in the number is removed when I open the MP again.
I am not sure if it is only a graphic error or if the number really change.
This happens on two different computers with Win7 and Win10.
This happens also with older Versions of Mission Planner.
It does not happen if I enter a comma instead of a dot
But its shown as a dot.
The choosen language is English fot MP.

MP accepts numbers in your system format.

ie comma’s in your situation.