Sitting parrots fly if you take damage from a nearby hostile mob

I recently created a similar issue ('sitting parrots fly if hostile mobs are nearby') which was resolved as 'cannot reproduce'. I have done some more testing and the issue seems to be that tamed sitting parrots will fly if a hostile mob nearby does damage to you. This is inconvenient because the parrots swarm you and it's very hard not to kill them while defending yourself from the hostile mob.