Movies crash/Stop after ~15 minutes

No, when you upload logs it will always also include the log from the last boot/crash.
But the one you uploaded didn’t show a try to play a movie nor a crash.
But I can see ‘2020-02-21 10:15:59.253 T:3569410784 ERROR: Read - Error( -1, 110, Connection timed out )’

Some suggestions:

  1. Can you provide Mediainfo of one of the files giving you a crash (see below)?
  2. Can you check your network performance with iperf3 [How To] Check Network Performance with iperf3
  3. Depending on the result of number 2 it might make sense to switch from your current Kodi SMB access to a Kernel based solution like fstab/autofs (Mounting network shares with autofs (alternative to fstab))

It would be good if we could find out more about the file you are having issues playing. Please see the mediainfo section in How to submit a useful support request - General - OSMC.

You can also create the mediainfo-output of the affected media file on the OSMC device:

  1. login via SSH, user osmc, password osmc
  2. if not already installed: sudo apt-get update && sudo apt-get install mediainfo
  3. cdto the directory containing the video/audio material in question
  4. since mediainfoonly needs to read the header information of the file data, copy the first 4 Mbytes of the media file to a new file:
    dd if="<media file>" of=purgeme.bin bs=1024 count=4096
  5. upload the decoded media information using
    mediainfo purgeme.bin|paste-log
  6. publish the returned URL here in this topic
  7. remove the created media file snippet
    rm purgeme.bin

Thx for your help.