I am having the same issue. Here is what happens when an unselected date is tapped 4 times: CV#110 3 dates loaded. 1)⬆️ Insert 3/3/2026. Now 4 days 2)⛔️ Nothing happened. Still 4 days. 3)⛔️ Nothing happened. Still 4 days. 4)⬇️ Remove 3/3/2026. Now 3 days. The original selected dates can be deselected reliably, but only once. If re-selected they act just like the newly selected dated. Saving and reloading the multiDatePicker seems to allow deselection - I don't know why. Have you found a work-around?

Adding "import MapKit" fixed it for me.