Enduring Life Flask can't be used on Full Life

Attempting to use a life flask while having the Master Surgeon Pathfinder notable allocated will not cause the flask to activate. The only way to use a life flask in this circumstance is by using a flask with a mod that grants you something on use like freeze immunity for x seconds, remove curses etc.

The Master Surgeon node uses the same wording as an enduring mana flask, but mana flask don't have this problem and can always be used when they have the enduring modifier.

Same here. The mechanic was fine without immunity suffix on yesterday.
And today I realize a lot of deaths is because of I don't have life flask up time as it use to be.

Master Surgeon has the same wording as enduring mana flask, but mana flasks can always be used even at full life.