Adding superscript in a line disables other opentype features?

First post here, hopefully the question hasn't been asked before, but I couldn't find an answer for it.

No matter how I input them, I can't seem to have both superscript and other opentype features, specifically old style numerals and small caps, in the same line of type. As soon as I enter superscript glyphs, the other features revert to regular text (see images).

It happens whether I add superscript glyphs from the glyphs window or from the toggle button in the character window. I don't see any reason the two features should be incompatible, right? Maybe it's a problem with the font? It's happening with EB Garamond Semibold (gotten through Adobe fonts), though I checked and the same problem persists with other fonts.

I'm not sure if it's a bug, a usser error, or if there's something I just don't understand about opentype.

Illustrator 28.7.1 on MacOS 14.6.1