Portamento gliss does not work *properly* in Musescore 4

In musescore 3, if I add a gliss (with the portamento option) between 2 notes, it'll slide from one to the other.
In musescore 4, it doesn't, the notes don't play as they do in musescore 3. If a glissando is put, then the slide will be played, just, not very smooth.
This does not just apply to MuseSounds, but any of the Soundfonts (including the default one) installed also.

It sucks.