Printing PLA + PETG as support - Not working

Hello,

I’m encountering an issue with multi-material printing using AMS Lite on my A1.

I’ve assigned PLA to the main model and supports, and PETG to the support interface layer.

The temperature changes correctly for the PETG interface

AMS shows both PLA and PETG loaded and active

Support interface is explicitly assigned to (PETG)

However, no actual filament switch happens its just continuing to print as normal, no pause, nothing. — the entire print is done using PLA, including the support interface

I have also tried adding a wipe tower, verifying filament assignment, and slicing multiple times. The issue persists.

I did follow your instructions, but no luck… Printing guide for using PLA Basic and PETG HF for support | Bambu Lab Wiki

Can anyone help me ? :frowning: