Failure: https://dev.azure.com/dnceng-public/public/_build/results?buildId=94300&view=ms.vss-test-web.build-test-results-tab
Console log: https://helixre107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-ab9b9480b24c424cbe/System.Net.Http.Unit.Tests/1/console.eb002831.log?helixlogtype=result

After some bisection it looks related to System.Net.Http.Unit.Tests.HPack.HPackRoundtripTests:HPackEncode(System.Net.Http.Headers.HttpHeaders,System.Text.Encoding):System.Memory`1[ubyte]. The bug repros with

export DOTNET_JitStressRange=27a5bb45-ffffffff

but not with

export DOTNET_JitStressRange=27a5bb46-ffffffff

and that hash corresponds to HPackEncode. But, strangely, it also does not repro with just that hash in the range.