Unofficial Skyrim Special Edition Patch

Recently, I encountered a Thalmor patrol on the road just north of the Haafingar Stormcloak Camp. My roleplaying dictates that all Thalmor must be killed on sight, so I decided to make this fight easier by leading them down into the camp. However, I discovered that when the Thalmor arrived, the soldiers in the camp ran rather than engage them.

The same thing happened when spawning a Thalmor Justiciar into the camp via console; however, it did not happen when I spawned a generic Thalmor soldier--in this case, the soldiers attacked the Thalmor as expected.

Is there a reason for the patrolling Thalmor to be treated differently from the standard, run-of-the-mill ones? If not, it seems like this should be changed, for consistency's sake.