Phantoms, when spawned, stay in the sky for a long time before coming down to hurt the player. They always do this. On minecraft bedrock edition, they stay in the sky for a few minutes and after that long of a time, they only take a swing at you once, leaving you with full health before attacking again. On java they are way more aggressive, and keep hurting you after a few seconds, being an ACTUAL threat. On bedrock edition, it s like they are not even there.