I have a filter created for a project which is advanced (cannot be simplified through the Basic link).

Your most recent release v6.2-OD-01 has broken the list view and the styling on the page has gone weird as well as the advanced filter is now confined to the column in which the Issue list appears.

Urggg - it looks horrible and is a very poor user experience

This is on your on-demand instance and 6.2-OD-01 appears to be marked as an unreleased release!