A few times I have pressed it and it has turned on properly and only noticed when like you I go forward instead of back but I can’t be sure that it wasn’t me and not the car I can’t be 100% sure whether I pressed it hard enough as the small few times I happened I kinda pressed it and began moving in more of a rush than normal so since then it’s kinda instilled in me to double check and I now reverse much much slower to start with like an inch to begin with so I know I’m going backwards. It’s possible it was the car but equally possible in my case the maybe 5-10 times in the beginning it could have been my fault
I will note thou that this happened in the first 3-5 months of hanging the car so it could have been another ‘settling in niggle’ I had along with a niggly electronic tailgate and others which all sorted themselves out in the first few months. Sorry I can’t be any more specific but did want to note my experience in case it is something known
