It's an atrocity that nearly 2 years later, this is a known issue with no documentation, and that occurrences are driven to support with no posted solution.
Even posting that it's a hardware defect with no fix would have been acceptable documentation. I'd just go exchange the mouse for a new one, expecting it not to be defective. Instead, I can only surmise that this is an issue with all Thermaltake mice and expect that exchanging it for a different unit would not fix the problem.
I'm gonna go return this and get a mouse from a different manufacturer. I'm also going to specifically avoid buying Thermaltake anything in the future, because this level of documentation on a known issue is abysmal. For shame. Way to drive away business!