Weird chord symbols when exporting to PDF/printing.

Edit: It solved... itself? After reopening the program a few times, it no longer misbehaves. (?)

Hello, musescore wizards.

I'm in a bit of a spot as to why the musescore is misbehaving and writing hieroglyphics instead of chords after export. All chords were written with Cmd+K, so no funky text-edits, and I've tried fiddling with styles so as to get them all on the same page (heh), but to no avail.

See attached screenshots for the 'before & after'.
The greyed out one is how it looks in the program and the white one is the exported PDF. Same result sending the sheet directly to the printer. What gives?

Thanks in advance :)