I'm having the same issue with Swift Playgrounds 4.6.4 on macOS 26.2 -- endless permissions prompts any time I start typing to edit my code. Only way to get it to stop is to right-click and pause the preview pane. Looks like some people are saying this is finally fixed in the latest macOS 26.3 beta. I think a big issue is that Swift Playgrounds is only updated once or twice a year. For half the year, Swift Playgrounds is out of step with the latest Mac/iPad OS versions. It never gets re-tested and issued bug patches on the latest OS versions as they come out, so for half the year the palygrounds app is very unstable.