Export Parts not working properly
Create a part containing 2 or more instruments from the master score
Click on the part.
Go To Export (not Export parts)
select either .ogg or mMp3 (only ones i've tried so ar)
Export the part....
In my specific case i created a part containing the 1st 3 staffs (vocals) from my master score.
The .ogg or .mp3 produced outputs as Piano and i'am not sure but i think it is a combination of 2 or more other parts in the score...it is NOT the actual Piano staff.
Tried several times, rebooting, reload Musescore etc. problem reproduces EVERY time for me.