No matter what I have in that module, whether my html code to enable PayPal subscription payments or just the word "test" it does not appear. I read about Edge not supporting something called srcdoc but that in a future build (now out and on my pc) it would be there, but no change. I've attached 3 images of the section in question, one each from Chrome, Firefox, and Edge, in that order (the one without "test" in small letters below "HTML Test" is the one in Edge. I'm on WIndows 10 latest update.
I've called in to GoDaddy support 3 times in the past month. The first rep saw the problem but downplayed the importance of Edge (not a great answer). The second 2 times they did not see the problem. But this was brought to my attention by a customer trying to place an order so I KNOW it's not just my PC, plus there's that past thread on the topic. Also, no problem using Safari on my iPhone either.