What is going on with LISTS?

This update has been slowly rolled out across our organisation over the past few months and as of this week it seems that everyone has the update which is causing endless headaches almost daily we are encountering new issues.

The latest issue's we're trying to figure out is when using a combination of a couple of column filters and a single column grouping the filters work for the first grouping section but not for the rest. Oddly enough this issue doesn't happen in Brave browser but does in the lists app, chrome and edge browsers.

Another major issue which wasn't the case before the update - all 3 below issues are related to the export to excel function 1) no longer respecting user level permissions or 2) folder level hierarchy and 3) filtered views when exporting to excel.
1) Users with folder level permissions (can only view/edit items within folders to which they have access) can somehow now see the entire list data when exporting to excel which is a massive data security issue.
2) When exporting list items from a specific folder within a folder hierarchy it exports all list data once again not only data from within that folder.
3) Also it's not possible to export a filtered view, more info here: https://answers.microsoft.com/en-us/msoffice/forum/all/sharepoint-modern-lists-interface-exports-to-excel/c850b3de-5da5-4e1d-b701-7c87e2b1caa3

We are now having to look into disabling the export to excel function until this bug can be corrected.