When tried to add an 3D model into the AR Scene,AnchorEntity(anchor:) called to get anchor for entity but app is getting crash when tried to creating anchor entity object and getting error like this (Couldn't find an anchor in the Real world to place the provided model)

I have created native app with textarea and found willshow and didshow callback is called again when dismissing the keyboard which is checked in xcode 13 & iOS 15.So my expected result for keyboard show in textarea is willshow:didshow:willhide:didhide.But i am getting the result as willshow:didshow:willshow:didshow:willhide:didhide.Kindly provide any suggestions regarding this