Whether the tree is open or not can have some effect, too.
If it is not happenig then we need more details. Opus version, type(s) of drive, whether Opus is seeing the deletions at all (e.g. via a lister looking at the parent folder when the deletion happens), and what is deleting the folder and how (Opus or another program? Recycle Bin or full deletion?)
I created a folder "test" in left lister, open it and delete it in right lister. Left lister will stay in deleted "test". As said, in the past DO jumped to parent folder.