'm having problems with my Balck Lagoon.

Here's what's up...

When you start a round, the machine kicks 2 balla into the shooter lane. When I let one of the balls drain, and leave the other one in game, the round sometimes ends immediately with "end of ball" message but most of the time it lets me play but at the end of multiball when one ball left again it drains. At the 90% os starts the machine does the same routine.

I have checked EVERY switch in the through, shooter lane. Switch matrix is also ok.
Can anyone tell me what's going on?

No magnets in CFTBL. When first ball dropped, after a few seconds other comes out. They don't stick together.

Off2War: That was my first thought. Only three balls in If I remove one, it says "pinball missing"

Switches work with balls rool off them. So I guess I have to search the problem elsewhere. I've heard about something about the 4 mega menü targets are connected somehow with this problem. But the mega menu targets are also ok. All wirings.

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IMG_20201009_152510 (resized).jpg

On first picture all three balls in trough and I navigate to center trough. So you can see the left and right troughs are also closed. On second picture 1 ball in shooter lane and 2 balls in trough. Left trough is opened, because it's empty. I think it's ok.