Missing syntax diagnostics in VS

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Repro steps

Create new Console App project with the following code:

type MyType() =

    member this.Foo(): MyType = {
        Field = 4
    }

    one two three

Expected behavior

We see errors in Error List in VS when we open the file.

Actual behavior

No errors shown when we open the file. But the errors do appear if the file is closed and project is built.

bugerrorpane.mp4

Related information

Appeared somewhere between 17.8 preview 1 and preview 3

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A current F# extension in VS 17.8 preview 1 works correctly, so it looks like some change in VS or Roslyn caused this issue. @CyrusNajmabadi can you have a look please?

It seems like results from IFSharpDocumentDiagnosticAnalyzer.AnalyzeSyntaxAsync are somehow getting lost. The semantic diagnostics work fine.

[0101]

@mavasani Did you get a chance to have a look at this?