On my system, I am not seeing the event 4 triggered, not until I end the game and is back on the Hyperspin Main Screen. Load Hyperspin and drag the EDS Appliacation to the 2nd screen, so that you can view the events in real time.
Make sure you download the sxs.dll driver and save it to your root Hyperspin folder if you are on Windows 10 or above. Remove it if you're on Windows 7. If you are Windows 11, download to the latest build. Try downloading a fresh copy of Hyperspin as well, just in case the antivirus removed any Hyperspin files.
I believe EDS looses focus with Hyperspin once it's not on the main window, triggering event 4. I'll do a little testing on my end. You can also utilize instruction cards through rocket launcher unless you prefer to show the artwork on a separate monitor.
Hyperspin 1.5.1 is free to everyone. You can download it from the link below.
https://hyperspin-fe.com/files/
Hyperspin 2.0 is in beta stage and is available to platinum members only at this time.
The Cart(Artwork4) should be assigned a higher artwork # than the Console(Artwork3). Also, are you using the images Themes or Images->Artwork location?