Router stop working

Have some problem from time to time server (gateway) mikrotik stop working and on the display line by line is displayed

eth0 error,poll already scheduled
eth1 error,poll already scheduled
BUFS: b_a 1513 B_F 0 F_a 65, F_F 0
a5212_interrupt:beacon miss

and this been displayed continuesly only router can work properly by manual reset.

please can some one help to resolve this problem