Description:

On a specific page built with SP Page Builder (Joomla 4/5 + Helix Ultimate), the off-canvas menu does not open in mobile landscape orientation. The problem occurs only when a single Row contains many columns/items (in my case logos — over 20 image elements).

Reproducing:

Create a Row in SP Page Builder containing ~20–30 Columns (Image addons).

Open the page on a mobile device in landscape orientation.

Try to open the off-canvas menu.

Menu does not open, the page freezes. No JavaScript errors visible in console.

Important:

Works in mobile portrait.

Works on desktop, even with the layout width reduced.

Works when I hide or remove a few columns (below ~19 elements).

Works if I split the Row into two smaller Rows.

Conclusion:

This is likely a layout/rendering conflict between SP Page Builder column structure and the Helix off-canvas script in mobile landscape mode.

Please investigate.