I do not remember seeing this behavior discussed, but I found today that if your print job finishes where the spool has run out in the AMS but filament is still present in the Bowden tube path to the extruder, the printer will purge the entire amount in the tubes as large poops until the path is clear since it cannot be retracted. For me where I have AMSs located under the table the printer is sitting on, this can make for a lot of poop to clear out of a long tube path.
I would like to see an option building on the other popular request to not unload filament at the end of the print - I could have used that 4 ft or so of filament for my next print.
