I am having issues too. On selecting a date or number of dates, then deselecting them, they remain in my selected dates Set. I have tried things like .id, removing hours/minutes/seconds, and DispatchQueue. No luck. The issue is only on iOS 26. Previous all ok - works perfectly. My only fix seems to be using a UIKit calendar selector instead of the SwiftUI date multipicker. I haven't done this yet. Could the issue be fixed for iOS 27? Would be a tremendous help.