The page itself is content page. But both the button and flow are on the content page itself.
I just tried it again on 3.3.3, and still seeing the same result. No params show-up in the action picker.
I am calling it on 3-4 buttons on the same page, and can’t see the option to fill out flow params in either.
When exactly this happens? Did you rename the flow just before adding the dynamic event?
When this happens - try clicking edit flow button and then hit the save button in the flow dialog. Does this fix the issue?
Tried it on a separate page/project, and the params do show up correctly.
Most likely some is wrong with my existing page.
I also tried creating a new FLOW on the existing page, and that still doesn’t show the params.
Will test some more and post my observations here. So far, it looks like a page specific issue.