furious wellspring with convalescence

So i was running into the issue of convalescence just breaking.
Pressed the button and the buff would dissappear even when not full on energy shield.
After hours of tinkering around i found that the shaman ascension note "furious wellspring" seems to break convalescence... which is weird cause its totaly unrelated to energy shield.

pls fix :)

after further thinking it might have to do with the rage.
since the spell uses a bit of rage on cast. the buff seems to dissappear once rage reaches maximum again