No, if you leave but failed to return to the match within two minutes, the penalty still stands and you are marked with the loss on your record. Customer Service will not help you with this. Details on this policy can be found here:
It is not a bug they deliberately intended this as protocol to deter deliberate leavers and those who are having frequent technical issues. Anyone can be subjected to a one-time issue, which is why the penalty of only a 15-minute suspension is the starting penalty.