Restarting seems to have a positive effect
As well as making sure that in the background, there is nothing ACTIVELY ON THE DESKTOP (minimize it all not just alt tab)
Still an active bug though.
Happens to me as well. Every game pretty much, tried adjusting settings, playing in street brawl, different items bought, no effect. Still happening on new patch
Bug still happening. No idea what is causing it but it is not helped by closing other programs or changing my graphics card settings. Intermittent in game but seems to scale up in frequency as game goes on, maybe caused by items