Chat logger seems to freeze after a few minutes

I recognized this issue on my old server before. It happened every few days (or even weeks). So it was not a big issue.

But on my new server I sometimes don't see a single server ping in the console.
And when I check twitch I see that my logger is not in chat anymore.

Any idea why it loses the connection or freezes?
Is there a log file somewhere that might show the error?

