Problem on max health showing

Summary

The max health showed is 10 instead of 11

Steps to reproduce

https://pastebin.com/7QHmq4LZ Just spawn the mobs in the pastebin

Current behavior

health showing = heal + 1

Intended correct behavior

health showing = heal

Server log file

https://pastebin.com/QXebXBFQ

Debug log snippet

https://pastebin.com/QXebXBFQ