"Files" pane opens a folder when I open a different folder

In Dreamweaver 21.1, I have severl Sites defined.  They all work fine, except one site.  On my local folders in the File pane, one folder keeps flipping open when I open a different folder.  In other words, a folder in my Files tab called "Members" is constantly opening on me.  I close the folder, clicking on the > to close it in the list.  I then open any other folder in this SIte, and Members reopens on its own.  This is annoying because it clutters my view of the Files when I am working in another folder.  This only happens to this one Site, all the other sites work find.  I made a copy of the errant Site, and it does the same thing.

How can I convince Dreamweaver that when I the folder Members, that it should stay closed until I want to open it?  I attached a screenshot of the culprit.