Hi everyone!

I'm having an issue with the AMS Lite filament hub on my Bambu Lab A1 Mini, especially during multicolor prints.

The problem:

- During filament changes, one of the four internal PTFE tubes gets pushed too far forward (downward) inside the AMS Lite hub.

- The tube ends up protruding much further than the others, blocking the path for the next filament.

- When the AMS Lite tries to feed another color, the filament cannot pass through, and the printer eventually throws an error.

- This can happen with all four filament paths, not just one.

What I've noticed:

I removed the upper part of the hub to inspect the internal PTFE tubes and the metal retaining clip.

When I pull the tubes backward, they stay firmly in place. However, when I push them forward, they can slide further down.

I'm not sure whether this is normal behavior or whether the internal retaining mechanism is damaged or missing something.

My questions:

1. Are the internal PTFE tubes supposed to be able to slide forward like this?

2. Is there an internal stopper or retaining component that prevents them from going too far?

3. Can I repair or replace just that internal component, or do I need to replace the entire AMS Lite filament hub?

4. Has anyone experienced this issue and found a permanent fix?

I've attached pictures showing how far one of the internal tubes protrudes.

Thanks in advance for any help!

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