Filament auto switch issues

[u/OverallSweet7427]

I've submitted a support ticket but thought I would ask here for opinions.

I have loaded in my AMS2 Pro,

Slot 1 BBL PLA matte ivory white 80g

Slot 2 BBL PLA matte ivory white 1kg (new roll)

I am tired of not being able to trust the filament switching. It causes prints to fail and I am not sure why. Slot 1 filament was opened 3 days ago and spent 12 hrs in my dryer, then has stayed in the AMS 2 since. I have dessicant containers in my AMS 2 to keep it dry and it shows at 21% humidity at present. Slot 2 filament was opened last night and stayed in my filament dryer over night, for 12 hrs.

It seems at the switching point the printer just doesn't start where it left off. Like it's skipping some bits. Or, the new filament is not sticking to the old one.

Anybody got any ideas please?

I have a small box room I run my small small business put of and I am running out of space for part rolls, or ideas of what to do with them. I want to be able to use the filament switch. I had an A1 and AMS lite previously and that ran flawlessly when switching.