Hi, I have a similar issue (you can see it here). There are three forminator forms—all with the same settings (the lower 2 are copies of the first)—placed as shortcodes within the accordion. You will see the first has the desired multiple columns whereas the lower ones have only one. The section is set to full width, boxed, the column containing the accordion set to width 100% (the forms all resize to one column on mobile as they should). Not a big deal, but wondering why this happens.
I’m afraid I’m not in a position to disable and one-by-one re-enable each plugin to find the one causing the conflict: it might not even be one running on the page; or it could be a theme (OceanWP) conflict.
However, the forms display correctly if I use their shortcode instead of inserting the form directly, a simple solution (I use Elementor). They are wonderful, I’m very grateful for them, and am happy this solution solved the problem! You can see one here if you wish. https://www.dappledlights.com/portrait-prices/
