How To Reproduce:
-Type "/effect <PlayerName> 21"
-Fill your hearts using the "Instant Health"
-Log Out
-Log In
-Lose Hearts 😞
Health Boost is useful for adventure maps, but this one bug breaks it entirely and makes it so you must complete it in one session!
Environment
Windows 8, Singleplayer
Duplicate of MC-17876, please use the search function to see if your bug has already been submitted. Currently over 57% of tickets are being closed as duplicate.