Annie's Ultimate

So I've been trying to get back into Annie, after divulging my urges to play other champions for awhile, and found out one still glaring issue with her ultimate, and a new one that I don't recall having a problem with before.

So for anyone that plays Annie long enough may realize, there are random periods where, after spawning tibbers, he can potentially just stop working by every sense of the word. He can't be controlled, he doesn't go after targets he's suppose to be designed to take priority, and ultimately becomes an unnecessary liability. Now, there are just as many times where this isn't an issue, but it's just common enough to where it's something that I'm surprised has been ignored for as long as it has since the mage rework.

The other issue that I've noticed that has cropped up recently, is that her stun doesn't always work. On more than one occasion, I'll have my stun prepped, my ult ready, and.... nothing. I see the enemy take damage, I see my stun get exhausted, but I also still see a moving target. Is it just me, or is that a problem? I could be hallucinating and maybe my mild rage has blinded me. But I've witnessed this issue just enough times to where it feels apparent that this also has to be addressed.

I love this champion, and I realize that her power as a nuker may lead some to believe that the bugs with her should just be ignored. But keep in mind that it is also these very bugs that could damn well make her useless in certain situations that demand the full brunt of her power in either a team fight or 1v1 situation.