Rider: Cannot enable NCrunch if opening a csproj file instead of sln

[v5.3.0.2]

If I open a csproj file in Rider "Enable NCrunch" is grayed out (it works in VStudio).
IF adding the same csproj file to a solution and open the solution, "Enable NCrunch" becomes enabled.

I don't know if we can solve this under Rider. The plugin life cycle is currently tied to the solution life cycle. I'll have to look into this, I'm putting a task on our board

Ok. FWIW, IMHO it's a minor issue. I just happened to notice it when trying out to do a repro. NCrunch even states "You can Enable NCrunch<...>while a solution is open." (in both VS/Rider though).