Versions Affected : All versions prior to TrueNAS 13.0-U2
In FreeBSD 13.1, periodic events of type EVFILT_TIMER will return at only half of the requested frequency, following the first event.
The bug may cause misbehaviour in software that makes use of periodic kevent(2)-based timers.
No workaround is available.
- Upgrade to TrueNAS 13.0-U2 or later.