Huge bug

Hey guys, i have this problem that whenever i channel a spell i get a freeze until the channel is over.

iIam playing priest and is experiencing this on spells like penance divine hymn and mind sear.

As you properly can tell i am playing the priest class.

I am playing on the newest Mac, but haven't ever experienced problems on the Blackrock server where i also play priest - with same addons.

any ideas to what the problem might be or maybe even a solution?

Thanks

try to disable all of your addon > cast penance ( ye I read you have same addon on blakcrock but no problem there)