strange sound at beginning of playback of generated WAV/or musescore.com playback (repetition of last bar?)

Hi,

This is weird (a corner case?). Attached is a piece that, when played inside Musescore (2.0.2, and FluidR3 Mono) plays ok. But if I export it to WAV, or upload it here (to this website), a faint strange sound appears just before the first eight note. If you delete the last notes (violins) in bar number 7 of the attached score, leaving a blank measure, it exports ok (the faint note dissapear)

I've uploaded the attachment to https://musescore.com/user/259496/scores/1640361 as a private score. This is happening more prominently (not precisely fainting sound) in the score I published for this cue (https://musescore.com/user/259496/scores/1636711). It's as if the audio generation "repeats" the last bar - but the playback via Musescore program (by means of the Playback button) works ok. Musescore don't reports any type of corruption for this score (the attached, or the published I just mentioned)

This also happened with other published score (https://musescore.com/user/259496/scores/930796) . Frankly, I tried a number of things (deleting initial rests in the first bars, changing to continuous view the score, etc) , but nothing. I don't know exactly why it plays (in the generated audio, only) the last bar at the beginning of the scores.