The problem is when you try to close an app while double clicking the crown button.
When you swipe a specific app to the left, a red «x» button appears, which is again used to close an app. Sometimes that app returns to its original position, and the «x» button disappears, which forces you to swipe left again.
Is this a bug? Don’t try to give me the «restart your apple watch», or «factory default» response, since it clearly doesn’t help.
Apple Watch Series 9, watchOS 11