Mastery bug

So when I was making my masteries, there was something that kept bothering me. When ever I tried to select one of the final tier for resolve, the description would keep spazzing out and kept moving to the top left corner and the bottom right corner. Because of this I have a very difficult time selecting any of those masteries. I would always end up trying to spam click it in hopes of upgrading the mastery. Please fix this as it makes it very difficult to make masteries on the fly