At 1:27 of the second period in the Flyers/Bruins game, Boston requested a Coach's Challenge to review whether Philadelphia was off-side prior to Jordan Weal's goal.
Review was not conclusive in determining whether Philadelphia was off-side prior to the goal. According to Rule 78.7, "If a review is not conclusive and/or there is any doubt whatsoever as to whether the call on the ice was correct, the On-Ice Official(s) will be instructed to confirm their original call."
Therefore the original call stands -- good goal Philadelphia Flyers.
Since the Coach's Challenge did not result in the original call being overturned, the Boston Bruins forfeit their time-out.