It seems you’re suffering from the bug that makes AI reset its velocity on every move request, and since you’re requesting move every frame (which is generally a terrible practice, efficiency-wise) your AI might end up not moving. The bug has been introduced in two places in 4.13, and in one of the hotfixes one of the points was fixed. I missed the other one, I’m sorry. The other one is fixed in 4.14.
If using latest 4.13 version doesn’t fix your issue consider using other methods of requesting AI to move (like “Move to actor or location”). Also, for your game efficiency’s sake, stop requesting movement every frame 
Cheers,
–mieszko