Are you basically saying the EDID should reset every time the TV and cable box reconnect, but it is not doing that I guess?
If so, why would it make a difference if the cable box was in Dolby or Stereo? Wouldn't changing the cable box back to Dolby now also trigger an EDID reset?

If I replace the existing cable box with a different model cable box, like the 4k model, seems like there would be a good chance this might fix it - of course I don't know which piece of equipment is causing this EDID/hot plug issue. The TV is a 2022 model so I'm jumping to the conclusion that the cable box may be the issue as I think it could be 3-4 years old.