PHP generated shortcodes don’t work

Hi,

I use the “Insert PHP Code Snippet” plugin and create some shortcodes in certain pages with it. Everything worked just find until one of the last updates around Dec. 2016 I have to problem.

The generated shortcodes are not rendered into actual tabs or buttons, however, the shortcodes are just displayed as text on the actual page. If I copy that text into the editing window of the page, the actual page, buttons and tabs work fine.

Btw… the php snipptes in the footer and sidebars still work fine. The theme hasn’t been updated so far.

Anyone knows what has changed in WP that causes the phenomenon?