Hello.
Since two days, when I open the Bambu Studio software, I have in the peripheral control pannel, the A4 location with a spinning arrow moving.
The others locations are like normal, showing a non turning arrow.
What this spinning arrow means ?
in advance, thank you; 
It normally indicates the printer is trying to identify the filament attached to the slot on the AMS lite.
When you attach Bambu Lab filaments the embedded RFID tag is read by the AMS to tell the printer what the filament is, including type, colour and important details like temperature settings.
For non-Bambu Lab filaments, you have to manually set this information.
It is the RFID tag being detected that normally triggers the visual indicator showing activity.
I used the word normally as there have been reports that there is a bug in the firmware and an upcoming update will rectify the problem.
No details are available on when it will be released.
Ok thank you for the quick reply.
It comfort me, I was only able to think about a RFID issue, as when I put out the filament from the AMS lite (just unload , without removing the spool of the A4 location) and reload it, the problem disapear.
But the problem is back every time I turn my printer ON.
It’s not a critical issue, I still can use the A4 location. I was just a bit surprised that this happend only on the A4. (I made some test with removing / switching all my spools). And I’m only using Bambulabs spools and filaments for the moment.
Today, I got another issue with the A4 location of my AMS Lite.
I launched a print using location A4 to finish a spool, and got another one on the A3 locztion. Same filament, so i could use the auto refill function.
I was phisically there to see that the auto refill function worked good, and it was done correctly. I waited 2 more minutes before going "afp’’ (away from printer).
When I came back after ~1h, I was suprised to not here the printer printing. In fact, the print stopped, and the mini control screen show an error from the assistant : " spool in A4 location is empty " and so , that let my printer nozzle on the piece so, the piece melted, and there was dropplets that cooled and made the pieces not usable again…
So that AMS issue make my plate of 6 pieces just a waste.
I tried to “unpaused” the print, but 4 pieces on 6 got screwed cause of the cooled dropplets.
Sad that this happened, cause I was there for the auto refill phasis and the issue poped after the A3 location was correctly running…
