Tvheadend

Hi,
i have a TVHeadend Server running (Build: 4.3-2049) on a Proxmox environment. I installed KODI on several PCs and on all clients I still have the same problems. The live TV is working without a problem. Also the recording of multiple streams on the server is not a problem. But if one of the clients want to playback a recording, I have a lot of different problems.

Problems:
Playback is hanging for several seconds
Playback crashes completely, go back to the Menu
Connection Lost to Server
audio and video not in sync

Currently the playback is running without problem only for around 2-3 minutes. After that time I have one of the upper problems and I have to restart the playback. Before switching to TVH I used the VDR for several years without problems. Maybe I have an error in my setup. Or do you prefer another client?

Hopefully someone is able to give me some tipps to update my setup.

Thx