Thanks for the downgrade tip. Got sites working again by downgrading to 1.21.1
As others have articulated, logic for change makes no sense. You either choose stack on mobile size or if choosing tablet then it is tablet and any screen smaller than tablet. As others correctly point out, why would one want to stack on tablet and not mobile.
Further, totally breaking functionality to those who are using is disrespectful. At this point if this is developer attitude then looking for another column plugin that stacks easily on tablet and mobile is solution.
I’ve been looking around. If anyone can suggest lightweight plugin with easy columns that stack on tablet and without a lot of effort and without extra bells and whistles please let me know. The reason I started using this plugin is because it was easy to stack on tablet and mobile with one click one setting… easy and simple.