Mikrotik 2.8.11 and 2.8.12 Kernel Panic

Hello, I have observed this strange Kernel panic in last two days in both 2.8.11 and 2.8.11. I have tested with different boxes and different hardware but the results have been same.

If I try to remove all the simple queues, removal of the very last queue crashes the MT box. I used winbox to add and delete the queues. Has anyone observed it? Thanks.

write down what you see on the screen when the panic occurs and send it to support@mikrotik.com