>I tried adding a brief WAIT after the RELEASE BAR in case it was timing, and also tried using ACTIVATE MENU after RELEASE to get the menu to refresh itself. Neither did the trick.
>
>So still trying to figure out how to resolve this.

Remove the whole vertical and build it from scratch?

I know it sounds expensive, but may not be. I once had to have two instances of browser object on two containers on the same page in a pageframe, and had all sorts of issues with bleedthrough, focus, and whatnot. In the end I resorted to removing instead of trying to hide, and creating a fresh one each time I needed it. It was blazingly fast, and all the issues were gone. That was seven years ago and I guess it still works - it did two years ago.