two big bugs in my server !!URGENT!!

Hi I have a problem, I have a MCPE server since 0.10.5 and I updated to 0.12.1 but in that version I have two big bugs that im not being able to fix.
1- Hunger Bar doesnt regenerates making the hit points not regenerating too.
2- When players pvp eachother or take damage by anything they kinda lost hearts more then the usual hit , for 1 hit it seems they take 2 or 3 hits , and when they die they can't respawn.