on first load of the page the SP Simple Portfolio module pushes the thumbnails together. on reload or after using the filter it is okay.

What I tried so far (all without change):
- Disable JCH Optimize
- Set the section to window height
- Set the section to a fixed height
- Tried to vary the number of displayed items in the module
- Set the modulestyle to xhtml, sp_xhtml, div, section
Using latest versions of Joomla, SP Pagebuilder, SP Simple Portfolio, Helix Ultimate