entity invulnerability doesn't provide invulnerability to knockback

when entering invulnerability frames and receiving the same damage and same knockback value twice or more

the entity receives more knockback then attacking it once

steps to reproduce :

1-get an entity(zombie.player..etc)

2-attack first to make the entity enters invulnerability frames

3-while entity is in invulnerability frame attack with the same damage and knockback

results:

the entity takes more knockback then one attack

expected results:

entity takes equal amount of knockback due to the entity being invulnerable to attacks during invulnerability frames

tips to reproduce easier:

1-use knockback enchant

2-entity against wall to be easier to reach

3-use of autoclicker for testing purposes