Can't see code documentation summary for JetBrains.Rider.SDK and JetBrains.Resharper.SDK

I'm developing a Rider plugin. but i can't see the code documentation for JetBrains.Rider.SDK and JetBrains.Resharper.SDK when i open types in Rider to investigate code.

I can see summary documentation for other assemblies and also for JetBrains.Annotations assembly.

only in one plugin project that i use as example i can see the summary for JetBrains.Rider.SDK and JetBrains.Resharper.SDK: https://github.com/matkoch/resharper-testlinker

this project uses an older version of the sdk.

but any other plugin project that i use as example, and also in my project, i can't see the summary, only decompiled code.

Its very frustrating because i know there is summary documentation but can't see it.

I hope someone can help with that because it will make my life much easier in understanding the rider and resharper API.

This is from the testlinker project where i can see the summary:

and this is from my project and other plugin projects, there is no summary: