I would ask for a new bike.... or make damn sure the entire engine etc is 100% replaced.
They could mess around for months as well....so make sure you ride them tho get a FAST resolution.
Great news there goingmad ... can i just ask when you say you are getting a phase 6 engine do you mean you are getting the 6th engine that has been updated since the M8`s have come out or a Stage 6 engine .
Only ask as i have a full Stage 4 Screaming Eagle 2017 Road Glide Special and have read where guys are getting Stage 5 or bigger engines and i just wasn`t aware you could go bigger than a Stage 4 .
When my motor was done they upgraded the Oil pump and haven`t had any issues as yet ... fingers crossed ... well except this newest recall affecting the Clutch ... mine is on the list but Harley Australia have not got enough repair kits to go around as yet ... or so Gasoline tell me ... 280,000 worldwide so the experts say .
You might want to get them to check yours as well while it is in being fixed for other issues .