To get a better understanding of the problem you are experiencing we need more information from you. The best way to get this information is for you to upload logs that demonstrate your problem. You can learn more about how to submit a useful support request here.
Depending on the used skin you have to set the settings-level to standard or higher, in summary:
enable debug logging at settings->system->logging
reboot the OSMC device twice(!)
reproduce the issue
upload the log set (all configs and logs!) either using the Log Uploader method within the My OSMC menu in the GUI or the ssh method invoking command grab-logs -A
publish the provided URL from the log set upload, here
Thanks for your understanding. We hope that we can help you get up and running again shortly.
2021-04-24 19:28:58.930 T:1500315872 ERROR: ffmpeg[596D00E0]: [matroska,webm] Read error at pos. 78740022 (0x4b17a36)
2021-04-24 19:28:58.931 T:1431920864 INFO: CFileCache::Process - Source read didn't return any data! Hit eof(?)
Can you upload a sample of the file so that we know the file is not broken.
In your current logs I only see H.265 files being played which may be to “heavy” for the Pi. Best to check if H.264 also show the issue (you wrote so in your thread but could see it in the logs).
I found the reason of the problem (for now):
I was using the nfs feature in kodi. Did a hard mount in the /etc/fstab and until now, no problem…
I’ll keep you in touch if this happens again…