Pretty similar issue here myself
I have plenty of experience and understand what’s going on. I have had to go through the usual diagnostics (reminds me of calling for internet support in the 1990s lol). Anyway like you I have paid a premium for this product and I’m not going to have/mod to Mae if function as it should.
After a tedious week( making silly videos of my completing the same tasks over and over bambu concluded there is a MC issue. When it got to the point of asking contact details to send replacement parts the realised I bought via a reseller and thobed me off to them right in the middle of the festive period.
Time to go through all of this again with a other company whenever they return from their festive time off.
Extremely frustrating experience, don’t understand why or how bambu couldn’t have done this on behalf to at least speed the process up.
Poor show bambu…