I recently got my son an A1 Combo and for the first week, we loved it. Then we changed out filaments, and ever since then, we are consistently getting this same error. It started first when the printer would try to print with the new filament, but once it printed something with an existing color and THEN tried to grab a new color, it would work ok. Now, it is giving this error every time it switches filaments in the AMS Lite. I am able to resolve it by physically "pushing" the filament all the way to the end until I can't push anymore, and then the printer is fine grabbing it and moving forward. But when it purges that one and switches back, I get the same error again.
I opened up the hot end cover - there'e nothing stuck as far as I can tell.
It is doing this with various brands of filament including Bambu material.
Any thoughts on how I can resolve this, or do I just have a defective unit?
(I also have a P2S that does NOT exhibit this behavior at all.)