Had the same thing, No Biggy , not all the time but a Few ...
You see the Big Black curved piece O Steel ...That directs the ball down into the Hole ..
Instead of Pliers to scare things up I took a 4" crescent/adjustable wrench [ Small Wrench] adjusted it down clamp onto this black Guide curved diverter and just ever so slightly lifted up to bend the black metal diverter ,,,[Hence the reason for the small adjustable wrench a better feel ]..and Walla..!!! ball comes out all the time now..
This unit just needs minimal tweaking as it just plays so awesome ,,