Last year I was starting to become concerned for the welfare of a chaser on one activation. It was like a robot that had gone rogue. Random bursts of the call sign, sounded like they were “working themself” etc. I think their machine/robot had gone rogue and I’ve not heard it again from that chaser.
@f5jkk Thanks for all the qsos last week. I got highly confused during two activations ( GM/SI-033 and GM/SI-014) - there was someone calling “/P” straight after your callsign (including during our QSOs) and bang on your frequency. Thankfully whoever it was continued to send “/P” through other QSOs so I was able to figure out. I was reminded of Guru’s excellent help sheet.
Regarding Morse tests, quality of sending etc. I like to think that I achieve a consistent standard (far exceeding my 5 wpm test standard that I passed) during most of my activations. Occasionally, I deviate from this and on such occasions I can only apologise to chasers if I am not at my normal standard. Such deviations might be, I might send their call correctly first time or not need three repeats of their call. Thankfully, these deviations in qso quality only happen on sunny days with no wind, so they aren’t frequent. 
73 Matthew M5EVT.