Stuck on 19 health after getting hit by a hostile mob

When getting hit by a hostile mob, the game gets stuck on being half a heart less than full health, even with full hunger or regen. The fix to the solution is to go back to peaceful difficulty and then switch to the previous difficulty used.

Video links for bug:

https://youtu.be/DVMBoN23fe0

https://youtu.be/QZvWODdkWA4