github sourcelink does not work; it generates wrong URLs?

I am using .net 8 which has SourceLink enabled by default. DebugType is set to embedded and nuget package seems to be created correctly when looking in nuget package explorer. However clicking on the source URLs takes me to a 404 not found page. When attempting to step into the source code in Visual Studio, it does not attempt to download any source code from github, but instead it's asking me to browse to the source file locally instead.

Modules says it's partially decomplied?

I also got the same result when using .net 6 or .net standard projects (with the instruction here https://learn.microsoft.com/en-us/visualstudio/debugger/how-to-improve-diagnostics-debugging-with-sourcelink?view=vs-2022).

Any help is appreciated!