I have made a service request for the same problem on https://www.sageappliances.com/ch.... They will now send me 2 replacement rings free of charge. It seems to be a wearing part.

It was the same with my press. There is a white O-ring on the fruit dome - it was extremely dented on mine. I simply loosened it again and now the fruit lid holds much better. Let's see how long that lasts. By the way, the O-ring is also available as a spare part: https://www.sageappliances.com/ch...

Yes, that's the same with my press. We put tape around it and now it works. Otherwise the press is mega.