Have you tried disabling plugins one by one to see if it’s another?
I’d start with WP Rocket and Asset CleanUp: Page Speed Booster… rule out cache script combining.
Then relevant / similar functionality. Perhaps “Login No Captcha reCAPTCHA (Google)” then WP Cerber.
Divi 5 is still in Alpha, and I don’t recommend using it for production sites – but I can say I’ve tested it with Yoast and haven’t encountered any issues thus far. That could change as Divi 5 continues to release updates.
re: Divi 4, I’ve used it on a variety of projects and never have any issues directly related to the core Divi platform.
Have you tried disabling “Email Encoder” to see if it’s causing the issue? Looks like a hidden field, and it could be a conflict with the recaptcha, CF7, and that.
