repeated notes sound conncected
this is not really a bug, it is more a playback issue. when writing 2 identical notes right after each other there is no definision between the 2 notes so it sounds like a conncected note. (i use musesounds). in order to produce this issue simply put 2 identical notes right after each other (doesnt matter which length or which instrument, i used a trumpet) and make sure in the mixer youre using musesounds. press play and the notes should sound connected.
I hear a subtle legato tongue for trumpet. Could definitely stand to be more clear though. For other instruments, it is more clear. probably best to mention the specific instruments you find most problematic, also the duration and the dynamic, since those variables affect the playback.
Trombone could be a bit clearer with no articulation marking. That is the main one I have noticed.