Why are some notes missing from my score?

https://musescore.com/copyist/pequena-czarda
On this score.
[code]The first passage for piano, then the piano solo (2:33), the octave in the triplets disappears, either the lower sound or the upper sound is played, although two should be played, and the passage after the solo, after the glissando on the saxophone, disappears half of the notes. When I play this score in an application on my computer (not the mobile version of musescore) everything is fine and all the notes are played.
I updated score four times, but nothing changed, so the problem is on the site.
P.S This is not an advertisement, and in order to understand, it's better to listen.[/code] It doesn't sound exactly, but the score has