Hey! The Easy Jet issue is being treated as a priority, and has been escalated to Mastercard. I think that enabling magstripe will do so for all transactions, not just ATMs.
From reading the post above regarding the airline, it sounds like this was an offline magstripe transaction. Offline transactions can come through weeks later, as magstripe is off by default, it would be quite difficult to coordinate a window to turn it on in order for it to go through.
@Justin Thanks for raising this, I will chat with our payment engineers to see if there is a way of avoiding this in future 