I am seeing that seemingly after the macOS 12.0.1 update, the macbook pro 16" 2021 is having widespread issues with the magsafe charger when shut-off, in which fast-charge causes the charger to loop the connection sound over and over without actually charging.
discussion pages: https://forums.macrumors.com/threads/2021-macbook-pro-16-magsafe-light-flashing-amber-and-power-chime-repeating-during-charging-when-off.2319925/
https://www.reddit.com/r/macbookpro/comments/qi4i9w/macbook_pro_16_m1_pro_2021_magsafe_3_charge_issue/
https://www.reddit.com/r/macbookpro/comments/qic7t7/magsafe_charging_problem_2021_16_macbook_pro_read/
Most people suspect it's a firmware/OS issue. Is Apple aware of this / is it being worked-on?
Has anyone tried this with the latest 12.1 beta as well?