Nah that part just rotates the enemy sprite so it faces the direction it’s moving. It’s not blueprint related because if it were then the enemy would be invisible all the time. It must be a material/spritesheet error if it only disappears on mobile I will investigate it.
Also new update has been submitted to epic. It adds weapon pick-ups and power-ups. Each weapon has it’s own icon and appears on the player’s hood and the player can switch amongst them freely. Each weapon deals a different amount of damage and uses custom projectiles. And the example power-ups are : Invulnerabilty, Multiply Damage , Super jump, Multi Jump and kill enemies on touch. The power-ups are temporary and you can set their duration.
I will get back to you with the missing sprites.