When printing with PLA Silk Dual Color filament, there is a small chance of filament rotation, potentially causing uneven color transitions. The A-series printers have a higher risk due to their special structure, so use of this filament with A-series printers is not recommended.
as it appears some still cant find it
PLA compatibility with A1 - Bambu Lab A1 Series / General Discussions - Bambu Lab Community Forum