sounds like a possible covid issue.

Ie: whatever pigment was being used has now been changed to a different chemical or additive.
The original either getting too expensive or just becoming hard to get.

Particularly if a different filament works fine in the same machine.

As was mentioned try different temperatures and different print speed.

having had several long chats with filament manufacturers - different colourants do effect filament properties.

You might also try the same colour in pet-g or pet.

Or - god forbid - even abs.

In the short term the answer is obvious.
Use a different colour :-)
And blame covid - that way you also get a sympathy vote.

You know I must have well over 100 spools of one type of filament or another in here - and not a single one of them is green.

So green is probably not a massive seller and it would make sense for there to be supply issues at the moment.

Just be grateful you're not in the computer industry. I wish I could just change colours to get supplies back !