roslyn: Editor doesn't render documentation comments properly

Version Used:

main

Steps to Reproduce: [jcouv update:] Compiler-focused repro was added below: https://github.com/dotnet/roslyn/issues/58966#issuecomment-1178659949

internal class C
{
    public static void M()
    {
        var a = new Test<int>();
        var b = a.Clone();
    }
}
internal class Test<T> : ICloneable<Test<T>>
{
    /// <inheritdoc/>
    public Test<T> Clone() => new();
}
/// <summary>A type that has clonable instances.</summary>
/// <typeparam name="T">The type of instances that can be cloned.</typeparam>
internal interface ICloneable<T>
{
    /// <summary>Clones a <typeparamref name="T"/>.</summary>
    /// <returns>A clone of the <typeparamref name="T"/>.</returns>
    T Clone();
}

Expected Behavior:

Actual Behavior:

More information:

This works if LSP editor is disabled, and was handled in https://github.com/dotnet/roslyn/pull/54164.

Originally reported by @ZacharyPatten in https://github.com/dotnet/roslyn/issues/54069#issuecomment-1014958482