interesting bug on 4s using IOS 6

iOS & iPadOS
So I've encountered a very interesting bug that did not occur in 5.11 but does in 6. Say you're in a phonecall using the earpeice and want to turn vo off or even just go to your homescreen. On my phone, when I hit home once, my phone goes to speaker and it will not accept any other presses of home except maybe launching the app switcher. When on speaker phone, tripple click and double click home work as expected. Can anyone confirm this? I spoke with Apple accessibility and the engineers claim they can't duplicate it. Can someone please confirm or deny this bug? Thanks!