My friend just reported this exact same issue. I going to debug his machine and report back what we find. Dr spaceman, you may want to verify that Ted isn't set to "disabled = on" in the features menu. The game could do that after some failures. If that happened, shooting the third ball into lock would start multiball.

I haven't looked yet. The pin isn't aty place. But I expect that when I go into switch test and test every switch that some will fail the test. We will see from there.

Thought I should give an update aswell. Went to my friends machine. No credit dot, no error reports. Went to switch test and triggered every switch on the playfield manually. They all checked out. After this, tested the game and it was fixed.

Seems it is a switch malfunction that causes this but there is no standard credit dot or error report.