Greetings from Syncfusion.
Query: “When Rotator NavigationStripMode set to Thumbnail it adds duplicate templates and last template missing”
We have analyzed the reported issue and we are unable to reproduce the reported issue. We have created a sample as like your provided code snippet. Please have the sample from the following link
Could you please update our Syncfusion.Xamarin.SfRotator package into our latest release package (22.214.171.124).
If you still persist the same issue means, please modify the sample as per your scenario so that we can reproduce the issue and help you resolving the issue at your end.