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Holy crap it worked! I've been experiencing this type of misshift behaviour for the better part of three years now. I have done all the other 'fixes' like the tape under the pcb and a completely overkill ground wire, no fix for me. Your suggestion worked like a charm for me! From the moment I got into motion plaforms, the problem started. I switched to a more powerful motion platform this week and pulled whatever is left of my hair out because the misshifts were occuring every 15-30 seconds. In other words, undrivable. I googled 'Fanatec shifter misshifts' for the umpteenth time and saw your (new to me) video. Figured I would give it a shot and found that the connectors were indeed a bit loose. I noticed that the glue that is there to hold the connector in place had degraded or melt or something, it was like gel. Bye bye solid connection, hello misshifts. Removed what was left of the glue on BOTH ENDS of the mentioned cable and put one layer of painters tape around the connectors on BOTH ENDS of the cable. I drove two laps of the Nordschleife since, no misshifts. Thank you dude, you made my day. Seriously.

I think your explanation of the problem is spot on. I didn’t realize that sequential/h pattern switch could cause this. Instead of adding tape to the connector I used a pair of tweezers to compress each of the female terminals in the wire ends to resolve the issue. Working great so far. Thank you!

The only thing that worked for me was bolting the shifter to the rig with fiberglass bolts + washers, isolating it from the metal of the rig. It was some sort of EM interference messing with the halo effect sensor for the R,1,3,5,7 axis.

I can see that my magnet under the one PCB is slightly off axis....any idea how to adjust the magnet position??

I am not disputing the fact that your problem was caused because of micro disconnections as you put it but the main problem with these shifters seems to be EMI or static issues caused by bad cables, some are having problems simply because they are connected to a Fanatec wheel base. I have received my new Fanatec shifter yesterday, at first I connected it using the short RJ12 cable to the USB adaptor which was then plugged to a cheap USB extension. After calibrating it I noticed that when in 5th and pushing the shifter to the right it would show 7th so in game going from 4th to 5th the game will register 7th before the 5th gear causing mis shifts. It was then impossible to calibrate, as soon as I start the software the 3rd input was flickering, putting it in first would show reverse and so on. Then I replaced the short RJ12 with the longer one that came in the box to the USB adaptor and plugged it directly eliminating the USB extension and it is working flawless till now.

I added a layer of tape to the connectors, and while it did make them wiggle about less, it did not fix the issue on mine. don't any of my multimeters handy to check if the wiggling actually caused any continuity issues... mine also very rarely goes into 7th instead of 5th or 3rd, so it was not just to the left. So I took off the pcb to add tape behind it since i hadn't yet tried that, and noticed the magnet has been touching the pcb and rubbed off the coating, revealing and touching the copper(i assume ground) layer of the pcb which is not supposed to happen.. added tape to the edges of the pcb to lift the middle, and so far that seems to have fixed it. before it misshifted every few dozen shifts, but after adding tape to the pcb edges to lift it up from the magnet it's been fine for hundreds without a single misshift.

Just to clarify: I added painters tape to BOTH ends of the cable that connectes the horizontal and vertical axis boards. Watching the video may seem that I only added the tape to one end.