If a Metadata Value has a static character (Letter of the alphabet, non-letter, a space etc...) in it, the application crashes when moving the mouse to that field.
In the below screenshot, you'll see I'm hovering over "Series Name".

Right below that, if I move my mouse down to the line showing: "Series Name", Season "Season", this is when the application simply closes.
To work around this I'm having to click on the left hand "Annotations" side of the line, then press Tab.

From there, if I delete all characters that aren't "Available values", I can then hover over the "Values" part of the line.

If I want to add any static text back in, I need to drag the "Available values" in first, then I can add the text.
No idea when this first started, as I rarely need to change the defaults I've setup.
I'm on Mac OS Tahoe 26.0.1.