Max Health attribute capped at 2048

Hmm i'm not too comfortable using the default "what i expected what happened etc" so i'll do it my own way , i'm pretty sure i can make the issue clear anyway

The issue is :

If i summon a mooshroom with 2500 hp , the mooshroom will actually only have 2048 hp
(works for every mob i'm just using a mooshroom for fun)
(works with every hp value above 2048hp)
(note : when i say work i mean doesn't work as it should)

Basically i can't get a mob with more than 2048 hp using attribute modifiers
(other note : giving the mooshroom healthboost after being spawned with 2048 hp doesn't give it more hp either)

(note : picture is on a 1.11 server just to show exactly how much hp it is , but i also tested it on a completely vanilla 1.11.2 singleplayer map)

Commands used :

Mooshroom summon :

/summon mooshroom ~ ~1 ~ {CustomName:"[Boss] Evil Mooshroom (lvl 90)",CustomNameVisible:1,Health:2500.0f,Attributes:[

{Name:generic.followRange,Base:60}

,

{Name:generic.maxHealth,Base:2500}

]}

Testing tool :

/give @p minecraft:carrot_on_a_stick 1 0 {AttributeModifiers:[

{AttributeName:"generic.attackDamage",Name:"generic.attackDamage",Slot:"mainhand",Amount:2048,Operation:0,UUIDMost:77283,UUIDLeast:170432}

]}

How i tested it :
Spawned the mob with supposedly 2500 hp
Hit it with a carrot on a stick that gives 2048 ad , mob gets one shot