Thank you so much for the your post. My Z cable is faulty! The plastic hump to lock it in place is not there.
Final update on this for me I hope. The connection for the z cable was not clicked in completely so it was intermittent at times. This was a fault in the dimensions of either parts or access. I had pushed it in as far as possible. See the picture. Upon taking it apart, I was able to click it in place. It still does not look perfect. The connectors may be slightly damaged.
Hey James,
thank you for reporting this (good photo)!
Did the issue not come up again?
Totally agree, been there, done that.