I'm sad to say that it sounds like this one was lost at sea. 😟
From retiringyoung's log entry:
"This one took a bit of searching, and it was found in a great spot. Something made a noise as I dumped the water. I thought it was empty, but now I think there may have been a TB in a watery grave. TFTC!"
Owner may want to mark it a missing now. It's unfortunate this one is now out of commission.