Man that really sucks but to be honest i am not really surprised , you have said on numerous occasions that you run ohm's considerably lower on the MVP going quite aways back.
Not following a charging routine to increase cycle life and running builds at or below 1 ohm i guess it's to be expected out of a device not really designed to do that .
Hey, you got a free Reo , your in good shape lol, i would recommend a dna 30 type device or mechanical since you love drippers and low ohm builds.
I had the exact same thought the minute I saw WS's post. I recall several post on how well it was running sub ohm coils and people warning that this was bad for the battery. I think that kind of heavy draw is probably the culprit here.