how to make my objects fall

so in my endless runner i have placed enemies that are spawned above the the tiles(my tiles are continuously produced using a blueprint, so i placed the enemy spawn in that blueprint) but the problem is that they are not dropping. i have enabled the gravity but it doesn’t solve the problem. they just stay in the air

this is my enemy ai:

the enemy is created using the wheeledvhicle (because it is a car)

could someone explain what im missing or doing wrong