My speculation on what happened with B1059 would be that there was some kind of heat shield failure allowing penetration. Just a guess. We'll see what SpaceX lets us know.
I thought the same thing too, but then I realized these birds float like ducks, so it isn't a big problem for them.
Upon a successful Falcon landing, I wonder at what point these seagulls vacate the platform before becoming extra crispy?
Falcon usually scares off seagulls. No animals are harmed in the landing of this orbital-class booster
The biggest explanation yet on what went wrong: Engine shutdown led to failed Falcon 9 booster landing - SpaceNews