This sounds like a program bug which I have never seen nor have my friends, but see if you can reproduce it and contact stern with the steps you did. I'm sure Lyman would like to fix it if you can reproduce it. Maybe its a combination of settings you have on the game that wasn't encountered during testing.
Quoted from zezami:Hi
Our pinball club just bought a TWD (v1.56) with manufacture date february 2017 with 135 plays total. On the first or second game I made it to Horde, about 20 seconds in to the mode the game just froze on me and reset... seems to be the same problem.
Anyone else have any updates on this issue?