I have a UltraTextEditor (txtShouldShow) with its ContextmenuUltra set to a popmenu created and set in design mode.  Other UltraTextEditors have (none) for this and none for normal context menu.  These controls sit on an UltraPanel which sits on an UltraTab page.  UltraPanel control has ContextmenuUltra set to none as does the UltraTab page.

Right click the txtShouldShow pops as the menu as expected.

Right click other text controls, no popup as expected.

Right click on the UltraPanel and the txtShouldShow specific  popUp shows up, which it should not, nor any popup;

Go to another tab, click on an Ultra option set Control and the txtShouldShow specific  popUp shows,, which it should not, nor any popup;

Click on an ultraGrid on another tab page, with its own specific ContextmenuUltra set, and its own specific popup shows, as expected.

Version 10.3