My 2015 Elantra cranked with no compression one morning, the belts turned, starter worked, but there was no engine gallop. After a few minutes, the compression slowly returned, it started then stalled and this happened thrice. An hour later, it started fine, I didnt see any codes or damage. I suspect VVT or the solenoid, anyway it's been fine since, but it's baffling, has anyone seen anything like this?