Jonathan.
Well, see this is the thing: As soon as I changed to hCaptcha, everything worked again. I don`t have any screenshots, but basically, what happened was that with reCaptcha, the Captcha module inside the form didn′t load at all, on neither Chrome, Edge, Opera (didn′t check Safari). Upon trying to send the form, there was an error message saying that: “Captcha is missing in this form”, and it didn′t get sent. But, like I said, now it is working in all of those browsers, including Safari on iOS. I don′t have Android to test with, but I assume that if it′s working in Chrome… Hope this helps you identify the error.
Sjur.