If I cast two DoTs in a fight, I get this double radius bug:
It occurs when I cast something like Liquid Lightning, then a wider one such as Caltrops or the destruction staff ultimate. This image was after LL + Destro Ulti. Sometimes this can stop me being able to activate one of the spells, almost as if the game is getting confused as to which radius I should be casting for. This can cause me some significant problems, especially when doing vet content and those DoTs are essential.
This seems to have appeared since the last patch update.
RIP Atherton, my beautiful little gentle friend. I will miss you forever. Without you I am a hollow shell.