DBQueue having processes that never end


We have been having a problem in the last days. Apparently our DBQueue have a big amount (over 1 million) of processes of type "Check single dynamic role" that are being processed but the amount of them increase again from time to time. We think also that this is interfering the normal behavior of 1IM since Account definitions are not being publishing in the IT Shop. Also, other processes are being processed normally.

Thanks in advance,