ATEM Mini ISO Chroma Key Glitch (Before & After)

Hi all,

Before you read on, I've spent many hours adjusting the colour adjustments of the keyer, background, spill, key edge etc etc.

I've had to blur out the names for confidentiality.

Basically I'm adding in lower third titles via a PowerPoint from a laptop. I have about 30 titles that need to come up and go. Each title was made in photoshop, exported as png with transparency and even works fine in davinci as a transparent graphic.

Loaded it up on my ATEM/laptop but when I turn on the keyer in the atem, the title background gets removed (i had no camera on thus the black, sorry i know its hard to see). I've tried different background colours (green, pink, brown etc) and messed with all the other adjustments and it still cuts my graphics colour. No idea why.

Thanks for the help, I'm totally lost