Hm, I don't see exactly what you see there. What I see is this:
Which looks "ok".
I assume you have significantly increased text size of your Windows. So that's what is happening here, but the behavior is more or less "consistent".
Thing is this text size doesn't work well with Windows at all.
If you take every other app, it will have issues. Take VoidTools Everything for example:
You will see that most of text is bigger, but not the search edit, and then the status bar at the bottom of the window.
Heck, if you take native Windows application, like Windows Explorer ("super" native and widely used), you will see:
You will almost everything with bigger font, but then again, in the status bar, you see the small font ("112 items").
So even Microsoft can't get it right.
I don't know what users expect, and I'm not sure if there is anything we can do here. TMS GUI actually uses only Windows native controls, by the way.