I’m linking a Dorico file of the problem here. This is in 24 EDO. There’s a touch-fourth harmonic on B-quarter-flat, which should appear as an E-quarter-flat above it. Dorico does indeed produce this to begin with, but then keeps changing it to the enharmonic D-three-quarter-tone-sharp. If I use Alt-Shift-Arrow-Up, then down, it returns to a perfect fourth again (on the enharmonic A-sharp, which is no problem to fix with Alt-plus), but then moving from the score to the part it shows it wrong again, then fixing it in the score, it goes wrong in the part… basically, Dorico seems to have trouble retaining the spelling in this case.