Reactive Shot frequently doesnt shoot at enemy (red) targets running into, out of, or around inside of circle telegraph effect.
Description says "Target a circular area. Until your next turn, you will reflexively shoot at the first three enemies moving within this area."
Both marksmen on high ground (Driftwood, west of town, dwarf attack, reactive circles on the ground in the pass, VERY CLEAR line of sight and no range problems). Target the dwarves. Watched both just run out of the circle on their turn, no shots. Image illustrating clear LoSa
https://imgur.com/a/phcGW