Form redirect randomly after Submit.

First try deactivating the cf7_sm_integracja plugin. It’s emitting JS errors.

Dear Takayuki Miyoshi,

I turned off the plugin and it still not working as it should. I use your fantastic plugin on another few websites and there wasn’t such problem with it :/

Moreover, cf7_sm_integracja plugin is used on the net site: https://dev.integro.pl/dziekujemy-kalkulator

Then try deactivating all other plugins and switching to the default theme.

I turned off all my plugins. Just left CF 7 and ReCaptcha for CF7 plugins active. I filled form on Chrome, Safari and Firefox browsers. Still have the problem with moving to next site after submitting.