Thanks for the quick response, Nick.
The plug-in has a free version, although we have the “Pro” – it does seem to work, so perhaps it “hijacks form submits” as you mentioned.
I’ve seen some rejections of bot-based form fills while allowing ones I manually filled out through.
Not sure I can share the plug-in code with you because it only allows use on one site, and it’s currently active, but perhaps could do a screen share if you like or something.