Mikrotik Version 3.11 Simple Queue Problem

Hello,
I have a problem and need help.

I launching Mikrotik version X86 in my server HP Proliant DL 320G5P Xeon Dual-Core.

I was with the 3.0 for AMD/Intel running smoothly. After that I moved to version 3.10 X86 started the following problem:

The client navigating stop. To go back to navigating we have to disable and rehabilitate the Simple Queue that customer and returns to normal navigate.

What might be happening?

Thank you

Flavio Barros - Sao Paulo - Brazil