The forms are only sent while logged in

Where can we see the website in question?

Yes, you can check at here: https://hazteweb.com/formulario-de-contacto/

I don’t see the 409 errors in the console. Of course I’m not logged in. Have you fixed something?

Hi @takayukister ! Thanks for your fast replies!

I was recorded the workflow comparing between the normal and private window using Chrome: https://www.loom.com/share/bb2871ea52b6430a88a059e725840841

With the normal window, the whole process stays in the same window, without refreshing.

With the incognito window this doesn’t happen. The window is refreshed and those errors appear. However, if the message is sent.

What other plugins and theme do you use on the site?

At the moment only Contact Form 7 and DIVI theme without any cache plugin or CloudFlare active.

All versions with the latests releases; the WP core too.

I’ve tried another time, updating and restarting my PC (and Chrome session) and now the problem was solved ( ??? ).

This is happening frequently, sometimes works fine, and some other times no.