Quick update for me…
I thought about going down the magnet swap route. I removed a filament y-splitter (allows tube from AMS and external spool to be used) that I used for a few months to eliminate that as an error. As I disconnected the AMS buffer to start taking it apart I decided to try printing without the splitter just to eliminate that.
I plugged the buffer back in and attempted a print. Well, it’s been working perfectly for the past week.
I don’t think removing the splitter did anything. The filament was always making it to the extruder just fine. I’m guessing, and hoping, disconnecting the buffer may have reset some internal cache or something.
I’m printing from AMS using the stock routing (no splitter) and have had dozens of hours of printing and filament changes w/o issues.
Not saying this will solve everyone’s issue, but worked for me. And I didn’t have to disassemble the buffer.