I have plugged the vacuum line of my jointer a bunch of times with green wood chips, I shook the hose and finally got it going.
Bamboo is a different animal and the harbinger of doom for vacuum systems. When I overload my vacuum system with bamboo it usually stops up right at the mouth to my vacuum fan. I disconnect my hose at the fan, reach down the hose and grab what has backed up. Once I clear the screen, actually it is a course lattice to keep big wood chunks from going into the fan blades, I am good to go for a while.
Disconnect at your fan to see if there is a stoppage there. Going slower when you grind bamboo may keep your system pulling the stuff out before it stops up.