Issue Description

Modify dotnet.backgroundAnalysis.compilerDiagnosticsScope to "fullSolution", but only show openFiles

project state

"dotnet.server.useOmnisharp": false,

"dotnet.server.useOmnisharp": true,

Environment data

dotnet --info output:

dotnet info.txt

VS Code version: 1.100.3
C# Extension version: 2.80.16

C# logs

c# load project.log

c# open file.log

c# close file.log

C# LSP.log

Steps to reproduce

TestConsole.zip

Expected behavior

Actual behavior