Runes of Magic US / AU

My first guess would be that some other add-on is interfering, though it could still be something strange going on with your DIYCE script.

When you say you "reinstall an old one", I assume you mean an old version of DIYCE (1.4) instead of DIYCE 2.x. If this is the case, then you likely are using something incorrectly in the DIYCE 2 code. Most likely the method used for the Buffs/Debuffs. That function underwent quite a lot of changes between DIYCE 1.4 and DIYCE 2. It could be you are trying to use the old way in your DIYCE 2 and that is what is causing the odd behaviour.

Every named function for every addon has to have a unique name. I made a Function CP for my Champion/Priest in my DIYCE which created issues with both DIYCE and CharPlan. I renamed it, and the problem was solved.