在Xamarin.Android上未检查的“使用共享运行时”绑定失败

I have an app that works fine in Debug build and mostly works in Release, but I get the stack trace at the bottom of this question. The binding that seems to be failing is the enabled property of the button. I think this because if I take it out the other bindings work. Simplified viewmodel code and ui axml below as well. I've localised the relevant difference between the release and debug builds to the "Use Shared Runtime" build setting. With this selected it works. Without it fails. Unfortunately I can not package the build for distribution if this option is selected. Does anyone have any idea what is going on here?I have an app that works fine in Debug build an