You probably have something wrong with your switches in your trough.

Here's JPs "ball savers".

About 3 seconds when the ball is fired into play (if it makes it to the pops and doesn't out and SDTM, it's usually gone.)

About 3 seconds after you hit the Raptor Pit during single ball play (you can see the "Caution" light I think it is flashing, when it stops it is over - NO grace period.)

About 10 seconds into Tri-ball.

I don't know about 6-ball. The trough is usually still firing out balls, so I kind of don't think it does.

Throughout System Failure.

If your trough is wonky, it may not fire balls out and instead keep firing random trough coils instead. Mine does this sometimes, and it is on my list of things to check through - when I am doing anything where it does a ball save, it will often fire a coil or two before the ball actually ejects and fires. I think it has to do with a bad switch on either the first ball position, or the ball right before that, or the switch in the launch lane.

It happens so rarely that I keep forgetting to care to change it up