Seems to be a UI bug with AE 2025, present in both the latest public release and the beta.
I have a dual-monitor setup, one monitor is 2560x1440 and the other is 4K / 3840 x 2160.
My regular workspace is set up for dual screens, but I often switch to the "small screen" preset to make screen recordings. When I make this change (and when I change back again) some of the UI text becomes tiny. This includes the RGB values in the info palette, and the colomb headings in the timeline (ie Source Name / Track Matte / Parent & Link).
Screenshots attached.