PNG created in photoshop corrupted
Hi all,
Over the past week I have had issues when I export a png from a photoshop file, this can happen using both export as and quick export, and when I come to place the png into another document it looks like this:

it is supposed to look like this:

I have had it with nearly every png I have exported recently - is anyone else having this problem and do you know how to fix it?
Many thanks
