Incorrect playback of sfz dynamic
In the attached version 3.1 file, observe that the sfz dynamic in measure 1 causes all subsequent piano notes to be played with a forte dynamic. The sfz dynamic (and similar dynamics) should only affect the note that it is applied to.
Also, in measure 3, observe that, as a result of the sfz dynamic, the violin note marked 'ppp' is not played at that dynamic level. Compare with measure 4 where the piano note marked 'ppp' is played correctly.