open in new tab..... not here

[janrif]

If I focus on an item in Explorer & <CTRL><ENTER> Item opens in new tab.

If I switch focus to another Explorer item & repeat I get the first focused item in a new tab, etc.

If I focus on a favorites icon & use the same set of keys, MS Word opens

Using keys <ALT><CTRL>A-Z or 0-9 do nothing.

I ran compact/repair w no change in the above behavior.