Enabling Server-Timing causes issues on .NET 6

[aluhrs13]

When enabling Server-Timing on .NET 6, the content of page seems to be sent prematurely, the sample page only loads:

Repro is fairly simple - main...aluhrs13:MiniProfiler-dotnet:main - it seems like the problem is the call to context.Response.AppendTrailer in MiniProfilerMiddleware.cs is the key point. Changing it to a barebones context.Response.AppendTrailer("Server-Timing", "missedCache"); still repros.

I don't know enough about the internals of HttpContext to go deeper 😢