Loaded two new Bambu Labs standard PLA filament straight out of the bag. At first the slicer showed them full but after a couple of prints and switching on and off it now shows the slots as almost empty when there is still 75%+ of the filament present. It is saying both filaments are loaded into the toolhead? What am I doing wrong?
Same thing happens to me with some rolls. I just think that feature doesn’t work very well.
Its a guesstimate at best 
Ya all Bambu studio does is estimates what’s left depending on what you print.
Also try the resync for the ams.
When you very first put the new filament in
Even though BBL filament has RFID. I resync anyways. I ha e found that sometimes it gets confused with the filaments
OK - turned off - restarted and resync AMS with AMS set to reload on startup and worked. Thanks guys.