For healing when hit, could either be Barriss or baby Cal that is healing them when crit.
Were you targeting DR or Ezra? Both prevent assists when they're the target. Could also be Bousch* Leia, she prevents assists for a few turns.
Reva healing, could be from the old set of DC where DS heal when they are damaged by % health, since Reva takes reduced damaged from % health, you might not notice. eg, Chewie hitting her, he does 10% max health damage.
Context is key, reading kits is also important. ie, what was the full lineups, what DC were in play. Not everything is broken just cause you don't understand it.