Nope no solution, other than closing the game and opening it again. I’ve posted this several times on the bug forum, and the tech forum and have had zero responses. One of the posts was closed and made unlisted.
I contacted the support using the online chat option, they sent me to an old post on here where someone else had this issue and the response they got was that the crash mailer app isn’t supposed to effect game performance, so there’s no way it’s causing any issues. And the guy I was chatting with basically just told me the same thing.
Also was told, "I understand that it’s not fun losing FPS and not knowing why. Though, if you are dropping from 160 to 150, the impact should minimal. You actually cannot see the difference while using a monitor that only goes up to 60Hz, unless the FPS drops below 60. "
So I guess we can just have to restart the game multiple times when playing since no one at blizzard has an answer other than its not supposed to effect performance.