Find All References: results are split into identically labeled groups

[zanaptak]

(Issue extracted from #9924. Reproduces on commit 14a29ca.)

Repro steps

• Clone: https://github.com/zanaptak/references.git
• Open solution
• Open View.fs
• Find All References on Data

Related information

• Operating system: Windows 10
• .NET Runtime kind (.NET Core, .NET Framework, Mono): .NET Core SDK 3.1.401
• Editing Tools (e.g. Visual Studio Version, Visual Studio): Visual Studio 16.7.1 + commit 14a29ca