Appointments+ not loading on other pages.

We are using Appoinments+ plugin in popups and contact page. For both of them, we are using same shortcodes. https://ux*** on this page - the appointments works fine. But on any other page - eg. homepage https://ux*** when we are calling same shortcodes (via do_shortcode WP function) in the footer it does not work after choosing the time step. If you click on the Schedule a Call button on the home page - Flexible Engagements section. You can click a Day, but nothing happens on the time step.

One more detail:
We've found that the only difference between the code generated by the shortcodes in contact page and in other pages is:

Adding this code below the shortcode in footer fixes the problem, but why we are getting it actually? How to fix the issue?