Scaling text boxes in Designer and App

In our application with WiseJ and PPJ, text boxes are suddenly rescaled and no longer correspond to the sizes set in the Designer.
Previously, the text boxes were always set to a height of 24px and were displayed as such.
Now the text boxes are scaled to 36px in the Designer or in the running application within a TabPage. In the *.Designer.cs, however, the correct size of 24px is still displayed.
Outside the TabPage, these are scaled up less, e.g. to 27px.

The interesting thing here is that it behaves differently for different developers and testers. However, the environments are the same everywhere:

WiseJ 3.5.15
PPJ 4.9.15

Sometimes the application looks correct, sometimes we have this scaling in VS Designer, MS Edge or Firefox.
Do you have any idea why this might be?

Thanks in advance for your help.
Patrick