summoning a parrot with /summon with spawn event on_tame makes throwed potions hit you except while moving

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It seems to me the bug here is that parrots summoned in this way are able to ride the player, since they probably don’t have an owner assigned.

Steps to reproduce
1 summoning a parrot by using /summon parrot ~ ~ ~ minecraft:on_tame rather than by taming a parrot with seed
2 walk to the summoned parrot so that it ride you
3 throw a potion or a projectile

Expected result : throwing a potion SHOULD not hit the parrot that was summoned by/summon parrot ~ ~ ~ minecraft:on_tame while it's riding on you, rather is should continue flying until it hit the ground or another entity

Observed Results: any potion or projectile that you throw while a parrot that you summoned using /summon parrot ~ ~ ~ minecraft:on_tame is riding you will hit the parrot. note the parrot won't get damaged