Bears Vitilaty give you +1000 HP SPACE, keyword SPACE
It in fact does not give you (what we all imagine) + 1000 HP & HP SPACE.
Meaning it will not only give you + 1000 HP SPACE it ill also fill that SPACE with HP.
Heres an example:
Lets say your WA's HP is 3000/3000 then once you use Bears it is now 3000/4000
What I think it should be is once you use bears your HP will be 4000/4000
Catch my drift? This also goes for other buff with HP