Kremlin shot at an insane long distance (probably over 14 tiles) to kill a scout as shown in the following screenshot.
A video is also recorded for reference: Bug Report: RUS Kremlin insane range attack distance - YouTube
Notice that the Kremlin is firing at the boar at the same time, so there is a chance the bug got something to do with the boar as well.
I watched this game on Twitch and see the bug. The player seems just move on, so I do the bug report for him.