I have 3 routers with about 100 Mbps PCQ shaping (simple queues), versions is 3.28, they rebooting every day.
Than i change PCQ to Default, all go fine, no more reboots.
PCQ reate is 5M, limit 3000, total limit 5000.
Default kind PFIFO, queues size is 3000.
please make supout.rif after reboot and send to support@mikrotik.com with short description of problem