Visual Studio 16.8 breaks SvcUtil build targets

We are using the dotnet-avcutil.xmlserilizer package in our solution to build xml serializes for a 3rd party wcf service we consume. We just upgraded our version of Visual Studio to 16.8 and are now receiving the following two build errors.

Error MSB4063 The "ResolvePackageAssets" task could not be initialized with its input parameters.

Error MSB4064 The "TargetFrameworkMoniker" parameter is not supported by the "ResolvePackageAssets" task. Verify the parameter exists on the task, and it is a settable public instance property.

We verified with that the code builds fine on a machine with 16.7.x and then fails on the same machine once the 16.8.1 update is applied.

Our code is in a .Net Standard 2.0 class library.

The errors is coming from the ResolvePackageAssets task in the dotnet-svcutil.xmlserializer.targets file.