A bit of spin is normal as noted. However, there are ample threads here from my experiences on my 2012 Tenere several months back regarding some irregularity with this phenomenon.
The short story is that Yamaha warrantied my clutch basket, plates, and assorted ancillary parts due to what they called a incorrectly machined part from the factory. The problem manifested itself with some weird clutch action. Over time, I kept hunting for why the clutch was not right and I discovered a peculiarity. With the bike up on the center stand, the engine at idle might cause some slight rear wheel rotation. This is normal as stated. Put the bike in gear and run it a second or too and then pull in the clutch. If all is working properly, the rear wheel should slow down and perhaps stop. If not, at the very least you should be able to stop the rear wheel spin with light pressure from your foot. In my case, pulling the clutch in did not slow the rear wheel down at all and even with burly ADV boots on - there was no amount of foot pressure that could stop the rear wheel "driving" despite having the clutch fully pulled in. It was at this point that Yamaha acknowledged that there was a problem and agreed to investigate. Once inside the right side cover, they found the problem with the clutch and replaced it. No problems since.