One of my motion sensors was somehow relabeled “Gmail Is The Tv” earlier tonight. I renamed it back to its original label. No one else in my household would have done this, so it likely was done by a Smartthings employee and/or service.
My guess would be database corruption, not anyone intentionally changing the name.
One Community member has previously reported, for example, seeing a sensor called “dining room sensor” on their account when they don’t even have a dining room.
And just in the last couple of weeks at least two members have said that rooms which they had previously deleted months ago had reappeared on their accounts.