Hi,
Just updated to SP Page Builder 6 Pro 6.2.1. Afterwards, all buttons on the page with links to pages (not download, just links to pages of my website) trigger a download of the linked page (as html file) instead of opening the linked page.
I downgraded to 6.2.0 again and the issue is gone immediately. So clearly the changes in 6.2.1 regarding download links with buttons are the culprit.
Cheers
Christopher