Hi PierreWU,
To start, a 710/Q50 is an outstanding Score - so you can comfortably apply to any Business Schools that interest you. The IR1 will likely NOT impact your applications at all - since most Schools still do not place much value on that sub-score of the Official GMAT. That having been said, if you'd like to know how an individual Program views the IR score, then you can contact that Program and ask.
Beyond that, it's certainly possible that if your Test 'crashed' DURING the IR section, then an error may have occurred in your IR scoring. If the crash occurred BEFORE you started the IR section though, then the issue becomes a bit less clear (and an 'error' probably less likely). You can certainly file a formal complaint, but it's probable that all of this will ultimately be a non-factor in your applications.
GMAT assassins aren't born, they're made,
Rich