SO bambu support has replied, I am not complaining, but I think there may be a language barrier going on?
here was one reply
Hello,
Thank you for contacting Bambu Lab support. I am sorry to see that you are experiencing problems with your printer, but rest assured we will provide support to solve them as soon as possible. In this case, the problem seems to be related to the LED light.
This behavior is normal as it generally turns on automactically when the pritn starts, The only time it may turn off by itself is if the printer has been idle and goes into sleep mode, However even then it still may remain on.
For this you are welcome to adjust the G-code for the start and end of the printing profile to turn on or off the light.
For mre infromation on this you may visit: Gcode control to disable LED lighting
Please let me know fi you ahve any questions.
Best Regards
Miles
Bambu Labs Support