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With reference to #1255

@SteffenL and @AlbertXingZhang, as far as Heisenburg bugs are concerned, I did manage to observe this error log being triggered once during a CI tests run. Re-running the failed test subsequently succeeded.

If not for the error log, the only symptom was that the windows test timed out (which is the mystery symptom...).
My memory is 98% clear on this.