Sorry, I was looking at a Flipper Pool schematic, which I assumed was similar. Found a B-A-B schematic, and it's different enough. Looks like you have a D (Reset) Relay that is a latched relay that could be a problem.
Your Ball Release coil is supposed to stay energized until you score 10 pts (the M relay fires). Then the Ball Release coil is supposed to relax. Is this highlighted m/b D switch working correctly? That D switch should be in the opposite state from that shown in the schematic. If it's in the state shown here, the Ball Release coil would stay energized, like yours is, and most of the 25V would be dead.
BAB D relay switch (resized).JPG
Does your D relay on the Control Bank trip when the score reels reset to zero?