Did Blackbeard deliberately ground Queen Anne's Revenge?

Why is Blackbeard thought to have deliberately grounded Queen Anne's Revenge when that has not been proved?

Deliberate grounding offered possible advantages: reducing crew-management problems and discarding a powerful ship that was attracting a stronger Royal Navy response. It remains unproved.

Queen Anne's Revenge had a large crew, which created management problems within the arrangements of a pirate crew. Her size and power also encouraged the Royal Navy to send larger vessels to deal with her. Edward Teach could therefore have found the ship increasingly burdensome despite her strength. Grounding her offered advantages compared with losing her through an internal dispute. Those incentives make deliberate grounding plausible, but they do not establish that it happened.