Twitch stream crashes after a certain time. What can that be?

I stream with streamlabs obs and the stream runs smoothly and without problems. But after a few hours the stream goes offline, but is still shown to me online at obs. Can then no longer close obs and must end it via the task manager. My games continue to run normally, so it can't be due to the internet. I've had this problem a few times now. Someone similar experiences?

The small streamers are always sent from server to server.

No not directly, but when I take a screen capture with other apps it also works. But do you have to stream for several hours?

Happens after different times. Sometimes after an hour, sometimes after 3.

Ah okay