Synchronisation creates damaged files

Synching a movies and pictures can cause some binary garbage: Same file, 2 states:

Uploaded with filesynch from mobile: https://murena.io/s/5cGBpFCL8MNGeog

Uploaded via Mail. https://murena.io/s/WJnqSeffFeBjkZa

It looks like it cuts some bytes.

It's a video of my cat drinking Water