Last week the Link-OS Multiplatform SDK was updated. In it, there were multiple bug fixes to the .NET library and the Xamarin libraries for Printing. You can download the complete update on Zebra.com. The Nuget packages have been updated on Nuget.org and the documentation has been updated on Techdocs.
Most notably the .NET library had some USB bugs fixed and Xamarin for Android had some issues with permissions and Bluetooth. This update should fix those issues.