IconImage: Exception when Foreground is set before Icon

[felsenbirne]

Describe the bug
When using IconImage from the FontAweseome.Sharp.Pro NuGet package and when the Foreground-Property is set before the Icon-Property following Exception is thrown during the InitializeComponent of the containing View:

Exception thrown at 0x00007FF812904F69 (KernelBase.dll) in Application.exe: 0xC0000005: Access violation reading location 0x0000000000000000.

When setting the Icon before the Foreground or using the IconImage from the FontAwesome.Sharp Nuget everything works fine.

To Reproduce
Steps to reproduce the behavior:

1. Add following control to Existing or new View:
   <faPro:IconImage Foreground="Black" Icon="Cog" />
2. Start Software and open View
3. The descriped Exception should be thrown

Desktop:

• NuGet-Version FontAwesome.Sharp.Pro 5.15.4