Another Filament Changing Issue

Hmmm (he says, thoughtfully stroking his beard…) that’s … odd.

Perhaps do a manual pause on one layer then later the built in Pause?

I didn’t deep read all the posts, but did you do a full set of filament profile calibrations in OrcaSlicer?

Also - on that subject, I have found different color of filament from the same brand can have dramatically different profiles, never mind across brands, that’s bigger.

Here’s a long post I did as a PSA on OrcaSlicer vs Bambu Studio if you are interested:
https://forum.bambulab.com/t/psa-up-your-game-studio-softfever-orcaslicer-arachne