My 2014 Outback 3.6r is experiencing an intermittent problem. When accelerating from a stop, experience a big clunk/car lurch when going from 1st to 2nd gear (around 20 mph). Feels like “gear” is “slipping” and then the loud clunk/lurch. No problem lights on dashboard. Doesn’t happen all the time. Can’t get it to misbehave for mechanics. Subaru repair scratching their heads. Anyone have a similar experience and if yes, what was the problem?