Mwktar

Hi gang, have a new to me 100s. I noticed when I was playing around and putting through the usual tests that the EVF has a very weird glitch at over exposure, almost looks like interference. i played around and this does not occur on manual EVF brightness, but only on auto EVF brightness. Any ideas? Anyone had a similar issues? Video attached here https://drive.google.com/file/d/16Hjqkt8SGiAWGye8KptjyN9AhV9nudTk/view?usp=drivesdk