Well I went ahead and replaced the fuel pump and the issue has been gone for a couple of days so I think <knock on wood> that was the problem. There is a valve in the pump that keeps fuel from flowing back to the tank event under negative pressure so it's my guess that that went bad in the old pump.

FYI - the pump that went bad is the 2nd Advance Auto pump I've put in the truck in the last 2 years. I put in a new Napa pump that looks identical to the original Toyota pump. Now I have to go write "I will never buy another part from Advanced Auto Parts" 100 times so I never do it again!