ADDITIONAL SYSTEM INFORMATION :
Windows 11 22H2. Also exhibited in 21H2.

A DESCRIPTION OF THE PROBLEM :
In JOSM, when opening the File->Open child window, the font of child window and menu of the parent approximately doubles.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
File -> Open
Wish I could attach a screenshot to demonstrate the issue.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Font size should remain constant.
ACTUAL -
Font size enlarges.

FREQUENCY : always