Dotnet Core calling a soap service issue

I have a dotnet core 2.0 app which makes some calls out to some 3rd party soap services. The web references have been added to the project using a wsdl and connected services. Everything works fine but periodically it stops working and throws an error.

Type 'generatedProxy_2' from assembly 'ProxyBuilder, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is attempting to implement an inaccessible interface.

System.TypeLoadException: Type 'generatedProxy_2' from assembly 'ProxyBuilder, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is attempting to implement an inaccessible interface.

at SoapClient.GetDetailsAsync(GetDetailsRequest request) in Connected Services\SoapClient\Reference.cs:line 1146

This api runs on linux container and when i restart the api the error goes away and everything runs fine. There is no issue on the service side because the method it calls exists. Web reference has been updated to the latest. There is no outgoing call from the api when this error occurs.

Any help in debugging or fixing this issue?

Thanks