Hi @Mineblo,
wow, thanks for your help 
- That was a good idea of you to track the condition in the scoreboard… 
You’re right - So it’s not a bug from the Attribute Evaluator, but with the correct update of player health when you get lives added…
(I only paid attention to the health meter and it is updated correctly)
Anyway, thanks for the tip - I’ve just tested it too. Only when the player takes damage (even at 0.000001 damage) after he has gained life is the value updated in the display… So until the bug is fixed, a workaround could be, for example, to subtract a point of life via powerup device (i.e. take damage) and then add it again - that helps me at the moment. 
Nevertheless, I hope that Epic will fix the problem soon.