This issue has me scratching my head... (MAM stops reading log)

Hi,
For the past few months I have been having an issue with mam.
When I start the server and MAM, everything runs without any issues, but after a while (maybe 12-24 hours of running) It stops parsing logs.
I would show you logs, but there is really nothing to see. When the map changes after the server has run fine for hours, it just stops saying

[22.12.13 11:44:00] Notice: Player 'foo' joined, PID: 1337, GUID:bar

The log settings aren't being changed and the logfile still displays normal logs:

3977:01J;GUID-GOES-HERE;PID-GOES-HERE;NAME-GOES-HERE

The weirdest part about all of this is that a gameserver restart fixes the issue, but a mam restart does not 0.o
Any ideas?

Thanks,
NiNJA

I can log in via tcp console, The last log is a normal Player Joined log