Minor max health bug small quantity of missing health

Bug : start map with 6607 max life

Around the linked time bloodrage reduces my healt by a flat rate 8? in the video the game decides my max health is 6599, then for the rest of the map that is my max health? even though on the right it indicates the same 6607

My character is using bloodrage but no blood magic skills , you can see while stationary my health does not go up , it is not a no regen map

https://youtu.be/Zd5odO4dSek?t=34

edit

I did some testing it appears that blood rage is reserving some life now , but it does not get reflected in any tooltip loss while using damage on full life.

last league we were able to run bloodrage and cover it by using health regen, has this changed , is damage on full life and bloodrage not something that work together anymore?