Has anyone else noticed this issue on manual filament change? Loads the filament but gives a busy error and cannot resume the print
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Yes, I had the same issue yesterday. There are much more errors in the new firmware. I wish, I could go back to the previous version.
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Is there any way to roll back the firmware? I make multicolour prints that I sell. This has just put a pause on my business. 
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If you have an AMS, thereās no problem. The layer shift only occurs, if you use the āloadā function in the feeding menu on P1P for manual filament change. And there exists also some workarounds:
- load new filament manual via heat up nozzle and extrude
- in the slicer use custom gcode instead of add pause to trigger the filament change
I can confirm the behavior. The load and unload buttons on the console do not work after a pause. Both result in a printer busy message. However, if you click unload in bambu studio, it will unload. If you load via the slicer, it will load, but it appeared to lock up my unit. While the load functionality happened, nothing changed on screen.
Iād suppose the printer was still wanting me to confirm filament extruded, but with no prompt as such was presented and nothing else happened. I then cancelled the print, and my multiple attempts to manually extrude while the printer appeared to be locked up suddenly occurred after the print job was cancelled leaving a bit of a mess in the trash chute.
Yup. Tried from the slicer indeed. Unload works fine. Load is greyed out. This is a real downer. The AMS is quite pricey in my country. Close to $530 die to taxes and customs etc. And I donāt do multiple colour changes in one print to justify that amount just yet.
Ok hang onā¦ Turned on āAuto Recovery from step lossā, I loaded the filament, made sure it purged, I waited for it to drop to 140Ā°/142Ā°. Immediately turned the printer off and on and it showed the resume. Pressed play and vuala!
Someone else try and confirm? Iād suggest a small print to make sure the solution replicates itself!
Hey, I tested this strategy. It did work for me. In my chaning filament thread I noted that part cooling does not resume immediately after a pause, and that problem still appears to exist.
-I introduced a normal pause in bambu studio āadd a pauseā.
-Upon the pause, I used bambu studio to unload.
-Then I used bambu studio to load. While there was no prompt of info on the p1p screen, I just touched the filament until I felt the gears pull it up.
-Once that happened and the machine extruded some material, I turned it off and back on and clicked resume.
The print did successfully resume. I watched it print two layers with no cooling, and then manually turned the cooling back on via studio. The part that came out was reasonable, but even those two layers in the middle with no cooling were cause slight warping.
EDIT: After this print job completed, the build plate lowered as expected, I removed the part and selected another print job. When I attempted to print, it said printer busy. I checked the printer and it still said āPrinting (filename)ā on the screen. I had to manually press stop to end the job, even though it had already completed.
I tried this and it worked except for the fact that he tried to continue printing with only 140Ā°C after the restart. Which obviously didnāt work and increasing the temperature manually only lead to the printer reducing it again.
So in the end i still scrapped the print and started it new.
First: Todays firmware update
P1P OTA version01.03.00.00ļ¼20230608ļ¼
solves the issue with layer-shifting.
Second: since the todays update there is now the āDoneā button, which finally appears on the display after the unload/load sequence. Previously this button only appeared in Bambu-studio and there it was sometimes tricky to recognise. Very important: the process is only complete once you have pressed this button. Then the printer is ready to print or resume printing.
This issue irritated me so much I went ahead and purchased an AMS