.NET Stack and UAExpert are creating different results with same input |OPC UA Implementation: Stacks, Tools, and Samples|Forum|OPC Foundation

My own client tries to send data to a proprietary OPC-Server through a function.

The problem is that the function call does not work when sent from my client. If I use UAExpert to send the request works (with the same input data).

Here is the issue I opened in the .NET stack's GitHub repo, which describes the problem more detailed (with screenshots).

Any guidance where the problem may be would be great?

I'm happy to provide more information if needed.

Thanks in advance
Jonas