Something "ain't quite right" with Hcigar HT75

[Walt]

Vapin along yesterday in TC with 55W available, a soft preheat for 1 sec @75 watts, 375°F and changed atties.  Atty just under performing.  Ok, put in a new build.  Worked fine for a bit and started again.  Got in Escribe and made some changes.  Yikes!  Screen reading OFF or 3350°F.  The thing is off the rails.  Hotter then hell.  Restored firmware.  Reviewed all profiles.  Did diagnostics on atty resistance.  Read a bunch of threads where folks did this and that and the problem came clear.  Put it up for the night and this morning it's fine.  Did a lot of things and have no idea what may have fixed it.  Not a confidence inspiring experience by any means.  My Therion is rock stable with the DNA75.  This thing is just plain rocky.