Mysterious band around the whole print coming and going away randomly

Hello,I have Bambu P2S I'm printing a base for trophy I've modeled from PETG, and I've noticed that on some of the prints I'm getting a band around the whole print like this:

https://i.imgur.com/96nVeDy.jpeg

The band doesn't appear on every print or at the same layer, it comes and goes, I've had prints without the band as well, I've gathered a few examples and highlighted where the band is (the prints are not ordered)

https://i.imgur.com/nEFrBBZ.png

In between the bases I've been printing these from PLA and I've had no bands on them:

https://i.imgur.com/0I4ksqw.png

I've tried these things:

• Printing with open top
• Printing with open top and slightly opened door
• Printing from AMS Slot 4,1 and 2
• Printing from external spool holder

I have absolutely no clue what could be causing this and how can I remove it.