For the Hotfix specified in the support article, Changes are made to rule pzPega_ui_events.js in the method "isElementDisabled". Added extra condition to find the disabled value of radio button and checkboxes.
So Can you please check and confirm whether do you have this in your rule. Can you please send us a screenshot of that method. Do you have a similar configuration of When condition Disabled?
I tried to reproduce in-house, but could not see the issue.
I tried to replicate it in-house with all Hotfixes installed for 7.2.2 and could see the reported issue in IE. Can you please raise an SR if it is urgent for you. One of our moderators can also raise a BUG to address this issue if it's not urgent.