Infrequent CI failure of perf-con-backpressure1

[mjp41]

The perf-con-backpressure1 test is failing occassionally:

https://github.com/microsoft/verona-rt/actions/runs/3847065854/jobs/6553081607#step:6:92

Platform (Standard, ubuntu-latest, Release).

Raising an issues to track failures.

[mjp41]

Another one:
https://github.com/microsoft/verona-rt/actions/runs/4629554648/jobs/8189949570?pr=22#step:6:90

No information in the log

[mjp41]

https://github.com/microsoft/verona-rt/actions/runs/8112355460/job/22173410600?pr=37#step:7:102

 47/454 Test  #49: runtime/perf-con-backpressure1 ..................Exit code 0xc0000409
***Exception:   1.24 sec