I have to agree with you that the tooltips is acting weird. I have my debuff tooltip active, but it only work on certain debuffs. But i just let it go.
I wondered the 'freezes' on health frame bars myself sometimes too. I just feel that is something wrong in there. But am just lazy to find other addons with the built-in healing clique.
Ivaria, I hate to say this, but just want to let you know it is very difficult to disable all the add-on and test. And the thingy is not always happy tho.