Exceptions are not correlated to requests in some cases

[lmolkova]

Repro steps

0. Create WebAPI or MVC ASP.NET app
1. Configure customerErrors=off
2. Throw exception in controller/view
3. Send request with Request-Id header with W3C-compatible value like Request-Id: |1234db4ce72f482698722d4f51beb518.0

Expected

Exception and request telemetries are reported. Exception is correlated to request

Actual

Exception and request telemetries are reported. Exception is NOT correlated to request

Bug introduced in 2.11