Why can't what I said also imply that I could hear the changes as they're made? What should I have said instead to mean what I said?
But going to line6bbd's suggestion, no it doesn't fix it. Only pressing the save button the POD fixes the issue. I made this video and sent a ticket to line6 a couple of months back and Pete from Line 6 Support said:
"Thank you for the detailed video and explanation. I was able to reproduce the issue hear with my HD500X, and I'm getting similar results. It seems to be jumping in volume every-time the preset is saved, and you go back to the preset.
This is not something I have a fix for, but I can inform our team here and log the bug. I'm not sure when a resolution will be available."
https://www.youtube.com/watch?v=k3TfXOotrXA