I've had the issue a couple of times today, although, interestingly, not first thing in the morning after my device had been asleep all night.  It only happened a couple of times in the morning, then no issues the rest of the day.
And just ran into another issue.  I was vaping an Aerotank Mega when, all of a sudden, started getting the "Check Atomizer" error msg.  I took off the tank and adjusted the contact pin on the device to make sure I was making contact - no joy.  Tried 3 other tanks that are working fine on other mods, but still got the same error msg.  Removing/reinserting the battery did not help, so I took the battery tube off, just to see what was there.  Also twisted the top 510 cap on the device just a bit, as I wasn't sure if it was supposed to come off or not (probably not).  There was a bit of give, but didn't want to push it, so put it all back together again - and it's working again!  Not sure what the deal was with that, but I'm starting to get a little leery of this thing.  I'm going to check if there's a warranty with this thing, just in case.