bug about spawning mobs

[slaaayerrr]

some mobs have time to spawn.. like 2sec
if i use shadow pierser at start of their spawning - it can hit them but doesnt deal damage
so it supposed to be:
1) i piersing and deal damage to them; OR 2) i piersing and skip them because they still spawning (they shouldnt be targetable)
atm it is bug.

(its not only about shadow pierser, SP taken just as best example of bug)

[slaaayerrr]

also same thing happens when mob moved too far from his spawn place and going back (reseting)
so while he going back - he is still targetable and he able to use his abilities (mage's curse in maus, big guys' smashing) but he cant be hurted and killed
for example mage-mob started to charge his red zone (curse), then someone pushed him too far and mob going back to his spawn, but he will still curse that zone where he started to charge red zone, and players arent able to kill him, because he reseting :/

so, this thread includes 2 bugs:
1) mobs targetable but cant be killed/hurted while they spawning and reseting
2) mobs able to use their abilities while they reseting

[reyals]

1) mobs targetable but cant be killed/hurted while they spawning and reseting
2) mobs able to use their abilities while they reseting

1) they are targetable for a very short moment (when they just start to spawn)
can this get fixed pls?