Mine does that. I clean them every time I go to the track and sometimes multiple times on race day depending on how dusty it is outside, not sure if hood clearance has much to do with it. I use VP C16.
What are your cam specs? A tight LSA with a fair amount of overlap can create a strong enough reversion signal to push fuel out of the air bleeds. Might not be an issue in the RPM range you go down the track, but may be happening at lower RPM's like in the burnout.
LSA? What engine? Unless the cam is on a very wide LSA most likely what your seeing is a little reversion. You might try a sheer plate or anti-reversion style spacer under it, it's a bandaid but may help and may even pick up time once you retune the carb as needed.