I can't believe this is it. But this is it. Too bad there's no quick toggle to turn it back on? It's possible to create a shortcut for it maybe. I currently have a back tap bring up a menu of different shortcuts I use. Shortcuts is another aspect that's really under utilized because the UX just sucks so much.

I think I looked for a shortcut action to no avail. But if you find one I'd be interested!

I assume it's something to do with distinguishing swipes from taps with both active, but it really is a marked difference.