SwifUI onAppear gets called twice

I had the same exact issue.

What I did was the following:

struct ContentView: View {

    @State var didAppear = false
    @State var appearCount = 0

    var body: some View { 
       Text("Appeared Count: \(appearrCount)"
           .onAppear(perform: onLoad)
    }

    func onLoad() {
        if !didAppear {
            appearCount += 1
            //This is where I loaded my coreData information into normal arrays
        }
        didAppear = true
    }
}

This solves it by making sure only what’s inside the the if conditional inside of onLoad() will run once.

Update: Someone on the Apple Developer forums has filed a ticket and Apple is aware of the issue. My solution is a temporary hack until Apple addresses the problem.