I’m not sure if this is quite a “bug” per-se but it’s certainly behavior that I find very irritating to deal with and wanted to discuss.
At least for Perspective views in the Project Browser, when cut and pasting items between levels in the hierarchy, most of the hierarchy instantly collapses upon cutting or pasting. My hierarchy is like:
View -> root -> Column Container -> (Other Flex Containers)
And when copy-pasting items within these flex containers, the entire hierarchy up to and including Column Container collapses. The root stays un-collapsed, but everything else instantly collapses. This is incredibly frustrating when what I wanted to paste into collapses right as I cut what I want to paste into it.
EDIT: This behavior also occurs when renaming items in the Project Browser.