DBM Problem

Hello,

I don't know if this is the right place for this topic so sorry if that's not the case.

I am playing resto shammie on Frostmourne, and using Zidra's DBM up-to-date version. However, timers get inaccurate from time to time, especially in dungeons. Is this a comon issue or there is a way to fix this?

I haven't tried how it performs in raids but I assume it will have the same problem...

Thanks in advance for your help.