I think this is an area VAR should not be used and it really is stacked against the keeper. The problem with using VAR here is that it means applying the letter of the law rather than the spirit of it. The rule is there to stop keepers running out towards the ball, not to stop the keeper moving half a foot off the line while moving to dive.
I hope the two examples of this we've seen in this tournament are enough for FIFA to see this is a wrong application of VAR. It wasn't used this way in LaLiga all last season so not sure why it's being used like that here
That being said, at 3-0 up with 15 to play it's shouldn't be coming down to a last minute penalty...