I can promise you, it does not. Meteodive breaks Guard, not Cover.
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I've seen a Paladin and a Ninja do it on Onsal, the Paladin didn't even need someone to cover-LB him... Just Cover the Ninja and Guard. Even if the Paladin eats a Meteostrike it's enough time for the ninja to just cap while under 48 people fighting. I'm pretty sure the only reason Frontline is still open is so that the Garo event can still happen, and nothing else.
As long as they’re not guarding you can knock them back, the cover only works within 10y so enlightenment will push them out of range giving you a chance to interrupt the one on the node. They can move back but cover and hallowed both only last 10 seconds so interrupting them once is all it takes. Just be aware of guard, it only lasts 5 seconds, not long enough to take a node but if you waste your knockback during guard then you won’t have it when guard wears off.
Last GM I spoke with said it's not an intended interaction so you might as well report anyone exploiting it.