[Solved ]Tychus Marauder's impact model disappears when you research "Hammer Munitions"

After researching the upgrade “Hammer Munitions” for the unit “Kev ‘Rattlesnake’ West - Marauder”, he loses the impact model for his attack.

(Feel free to try this out yourself by going into the editor, testing his attack without the upgrade, and then testing his attack with the upgrade)

My question is… After researching the Hammer Munitions upgrade, how do you give him back the impact model to his attack?

Update: I realized the actor that is linked to the attack was only giving an event for “PunisherGrenadesU” (his original attack), but not “PunisherGrenadesU3” (the upgraded hammer munitions attack).

To fix this, go to the actor “TychusMarauderAttack (Unnamed)” -> Events+ -> then copy and paste the two start and stop messages for the “PunisherGrenadesU” effect, but replace them with “PunisherGrenadesU3”.