I've been having these glitches(see pictures below). They started a few months ago, (I checked my older footage). But it's not just mine, three rental models had the exact same issue! Is this a known issue with this model? It ruined a quite some of my shoots.

Also, I send for repair and they put in a new 'mainboard'. But that hasn't solved the problem. I returned it again but I don't have a good feeling about it.

Any suggestions?