The Bonus Hole Eject solenoid only has a circuit through the Bonus Hole Score relay so I'm going to assume that relay is firing when this happens, but I need you to check on that.
The most likely ways the Bonus Hole Score relay can be activated are: (1) Through a switch on the 5000 Bonus Hole relay, or (2) The Bonus Hole switch.
Are both the Bonus Hole Score relay and the 5000 Bonus Hole relay activating when this happens?