I've noticed while doing some tests for a different bug, that, at least with the attached save, the approaching Watcher doesn't send out distress signals in any visible¹ way when close to the approaching ARC (but will still alert it!).
When using a Signal Jammer, there also won't be any log message for jamming a signal, even though the Watcher does get jammed.
And even weirder, if i disable my Signal Jammer after the Watcher's first attempt(s?) at communicating my position to the ARC, and stay within sight (most of the time) of the Watcher for a bit, the Watcher doesn't seem to make additional attempts at communicating my position with the ARC despite being close enough to do so, as indicated by the ARC never tracking me.
¹No expanding yellow circle or log message.