Tremolo is not played correctly. The repeatable notes are not evenly distributed in time and a small gap is created at the end.
In the attached example is a tremolo (with 3 strokes) with the mentioned gap, and a written tremolo as it should sound.
There is a long standing bug/issue where the note length is applied to the total length of the tremolo.
So, like, a normal note is played back at something like 90% of notated duration, but with a tremolo that 90% is applied to the “total” length, rather than to each individual note within the tremolo.