UPDATE: SCAR SKSE v0.13 (Patreon)

Changelog: Fixed issue where NPC launches the first attack even when the attack target is obstructed by a wall or other object. (This is a vanilla game engine bug, SCAR fixes it incidentally)

All credits for the skse plugin go to Maxsu.

Mid Save/Playthrough Update SafeNew users, Refer to original SCAR SKSE post for install instructions. 

Existing users, just replace the original SCAR SKSE and you're good to go.