Excel 365 right click menu refreshing

[Cpl_G_USMC]

I switched from Excel 2016 to Excel 365 at work. My add-in has customized sub-menu items added to Excel's "Cell", "Row", and "Column" content menu.s This XML worked flawlessly in Excel 2016--my menu items were always visible and executed. However, in 365 when I close all workbooks but Excel is still open, when I then open a new or existing workbook, my "Cell", "Row", and "Column" context menus are refreshed to their default items; thus, losing my customized sub-menu items. What is causing 365 to refresh the these context menus and returning to default sub-menu items after all open workbooks are closed. Any work around?