Undefined variable: element_id

Hi Sven, I′ve mailed you already last Thursday, here are more details.

Using latest plugin version;
created a form with 3 text fields, 1 text area; field 1, 2 an 4 required;
added action for e-mail notification and forwarding to another page;
inserted Shortcode: [form id=”332″]

Notifications on form page:

Notice: Undefined variable: element_id in /var/www/vhosts/<domain.tld>/httpdocs/wp-content/plugins/torro-forms/core/element-types/base-element-types/textfield.php on line 65
Notice: Undefined variable: element_id in /var/www/vhosts/<domain.tld>/httpdocs/wp-content/plugins/torro-forms/core/element-types/base-element-types/textfield.php on line 65
Notice: Undefined variable: element_id in /var/www/vhosts/<domain.tld>/httpdocs/wp-content/plugins/torro-forms/core/element-types/base-element-types/textfield.php on line 65
Notice: Undefined variable: element_id in /var/www/vhosts/<domain.tld>/httpdocs/wp-content/plugins/torro-forms/core/element-types/base-element-types/textarea.php on line 58

Any idea on the cause?
Should I just turn off notifications?
The page-forwarding works, e-mail notification (via Plugin Easy WP SMTP) not.

Possibly relevant Plugins:
iThemes Security Pro, no effect after turning off;
qTranslate-X, required for DE+EN (no chance to turn of for testing);
WP Super Cache, activated.

By the way, Plugin Really Simple CAPTCHA is required for using Google reCAPTCHA or not?