I have had a very, very similar experience. LIDAR calibration impossible since last update. I also filed my ticket on 30 Dec without response to date and of course also ran through the wiki.
While I can still print (with PLA), I am really not keen on fully manual calibration. With a second AMS coming sometime soon, doing at least 2 calibration runs per filmanet is going to take ages…
In the forum, there are a related threads:
Unfortunately, no easy solution on the horizon. I expect that Bambu may be looking into the problem both on the hardware side (my LIDAR failed after about 1350h with PLA and PETG) and the software side (depending on number of tickets filed for this).
Still, in the EU this is clearly a warranty issue during the first 2 years. I understand it’ll take them some time , especially since they seem to have been unable to come up with “easy” solutions in the past, but if I have to go for another week without even so much as a personal reply, I fear that I’ll be at my wits end. I would probably not have an alternative to demanding a replacement printer under EU warrantly law. 
Regarding your bed adhesion issues, I doubt that this is linked to the LIDAR issue as that will just rely on the nozzle capacitance sensor if LIDAR data is not useable. So maybe do a reset to factory conditions in case you are unable to revert changes and try the original smooth plates with glue. As for the textured plate, there’s a long thread in the forum concluding that an occasional clean with steel cleaning pads will quickly resolve issues by providing a more through clean/polish.
My connection is currently a bit slow. I’ll update this post when I have a chance to find the thread.