Explicit class/end/with loses members

[dsyme]

The code

type C() = 
  class
   member x.P = 1
  end
  with
    member _.Run() = 1

loses the member "Run" when formatted. I don't like the code (neither the explicit class/end nor the unnecessary use of "with") but it is valid. Found when formatting FSharp.Formatting

Issue created from fantomas-online

Code

type DocsGenerator(format: OutputFormat) = 
  class
   member x.P = 1
  end
  with
    member _.Run() = 1

Result

type DocsGenerator(format: OutputFormat) =
    class
        member x.P = 1
    end

Problem description

Please describe here the Fantomas problem you encountered.
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Extra information

• The formatted result breaks by code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.

Options

Fantomas 4.6 branch at 10/31/2021 14:52:39 - 420ef5c

Default Fantomas configuration

_{Did you know that you can ignore files when formatting from fantomas-tool or the FAKE targets by using a .fantomasignore file?}