vovkasolovev on "[Plugin: Jetpack by WordPress.com] No Contact form when no Posts"

Hello!
I accidentally found, that Contact Form don't appear when you don't have any Posts, have only Pages. I create simple custom theme with only one Page and put Contact Form on it. Form appear as simple text: [Contact form]. And when I add one Post, Contact Form is showing on Page and redirect to that Post on Submit.

https://wordpress.org/plugins/jetpack/