Player/mob damage knockback bug

When a player/mob takes damage or during red color, they shouldn't able to receive more knockback. If you spam click while sprinting, it deals more knockback. If you sprint and click slowly/only one time, the knockback weren't as much as spam clicking. Meaning spam clickers especially keyboard players can literally win straight ahead while slow clickers(most of the phone or mobile players) had extremely low chance winning a fight. Unfair, I hope they can fix this bug so slow clickers will at least have a chance to win. Especially timing clickers, respect mobile players please. The video below is I tested it in survival with no mods, the first sheep I hit I clicked multiple times, the second sheep I hit I only click once (all of the actions are done WHILE SPRINTING)