Circle image is not working in xamarin forms ios(Showing as oval shape)

For the circle images, I am using Xam.Plugins.Forms.ImageCircle nuget package in my project, which is working fine in android and windows but showing an oval shape in IOS, screenshot adding below.

Added ImageCircleRenderer.Init(); in AppDelegate.cs

xmlns namespace added:

 xmlns:controls="clr-namespace:ImageCircle.Forms.Plugin.Abstractions;assembly=ImageCircle.Forms.Plugin.Abstractions"  

   <controls:CircleImage 
              HorizontalOptions="Start"
              VerticalOptions="Start"
              Margin="0,0,0,-5"
              WidthRequest="50" 
              Aspect="AspectFill"
              BorderColor="#1C7DB4"
              BorderThickness="2"
               HeightRequest="50" />

Why in IOS only it is not working?
Thanks in advance