Hi
1: Thanks for sharing. I will inform our team about the issue
2: No, this is not the update for Helix 3 Framework 2.5.8 This is the update of Helix Ultimate framework
3: Not yet. Upgrading to Joomla 4 right now in production sites is not recommended. There are many third-party extensions like ours that are not fully compatible yet. It is better to wait at least a couple of weeks to see how things are going. Meanwhile, we will update our products accordingly. Please check our roadmap for Joomla 4:
https://www.joomshaper.com/blog/joomshaper-s-plans-for-joomla-4
4:You can follow this blog
https://www.joomshaper.com/blog/everything-you-need-to-know-about-joomla-4
-Best Regards