Just to clarify, while I'm using an ipac4, I don't think that it is defective. This is why I haven't contacted Andy at Ultimarc.
I've been troubleshooting this issue where every 3-5 presses of down on player 1 registers twice. So it will go down, down, down, double-down. So you'll randomly skip a game or wheel while browsing. No one has ever noticed any weird behavior in-game, but I can easily replicate it in notepad or word. I've physically checked the connections, but I'm kind of stuck at the moment.
Has anyone experienced this kind of issue before?
Possible issues:
1. Defective microswitch? It's a cherry on a Happ Competition purchased new in 2005.
2. Ipac4 issue? I bought it new last summer. I have a new, unused ipac2 that I could test. It would be a minor pain to set up, which is why I haven't done it yet.
3. A Windows 10 software issue or something else that I haven't considered?
So far, this isn't a huge deal. it is slightly irritating skipping games in Hyperspin once in a while, but I haven't noticed any gameplay issues, which would be more troublesome.
Thanks in advance for any advice regarding testing or troubleshooting.