Marching Percussion, Playback Issues and ETC.

Hello I'm CJ and I was very excited about the new update that is Musecore 4, but unfortunately, there is a playback problem for Marching Percussion. I don't know if this issue is also going on with concert percussion but I know for certain that the marching snare is not working at all, the marching tenors are only working with a few of its drums, the marching bass drums are not working at all, the only thing in the marching percussion seemed to work is the cymbals. I also noticed that the audio is very glitchy and laggy, if I press a note for the sound it is very noticeable how slow and glitchy it sounds even on playback. The dynamics I feel are also way too exaggerated which can be a good thing at times but especially when parts of the score are at piano or forte it's either barely audible or way too loud. There are also parts where instruments are playing a totally different rhythm in the score when in the other parts, it's the same rhythm and playbacked normally( 1st Alto Sax ). When there is a jazz score the playback doesn't sound anything like jazz, it sounds great if you write chamber or orchestral compositions, but if you are writing jazz it does not sound right at all. To much reverb and the texture of the sound is too airy, especially in the lower notes of instruments like a trumpet. Speaking of the trumpet the range seems to be shortened, I vividly remember in musecore 3 having the ability to play a concert at least to an f6 above the staff, but now it's inaudible and is a real downside for someone who wants to compose lead jazz trumpet, with the jazz portion being limited to the new muse sound and the lead portion as well.