It turned out to be… Samsung Keyboard in the end, probably reinstalled itself after a system update.

I thought it’d be something like com.samsung.clipboardsaveservice, which was the culprit on my old phone, but it didn’t even exist on my new one.

That’s the true meaning of Grok.

The automatic options on Mint make everything extremely easy. Do you want to keep Windows, or get rid of it? How much space do you want to give to Mint and Windows? Okay, done.

I’m using FlorisBoard :) Whatever is doing this it’s not Samsung Keyboard, it’s a separate package.