Mangle make transmit bandwidth on all interface drop

Hi,

I have CCR1036-12G-4S with 6.30.2 routeros on production. Suddenly I realize that my transmit traffic on all interface is drop significantly.

The board is configured with 500 Mangle rule with load on 50% averages, when I disable all rule the load on 10% averages and bandwidth on all interface is back to normal. but when I re-enable the rule bandwidth is drop to 300Mb averages. this only affect on transmit.

I use mikrotik tool bandwidth test to test the bandwidth ( point to point ).

PS: mangle rule is use for queue, and disable all queue is no effect.

Anyone had this issue before?

Thanks