when added a new visual separation, it adds a new shortcut, not the separator.
It happens after installing some of the recent updates from the last two weeks.
Which version are you rockin'? With 5.105 (2025012305) there's no such issue or maybe you are doing something different?
CMD + Shift + S is the shortcut for new "Visual Separator" OR from the menu: Edit/Add New Visual Separator
Yep should be fixed with 5.105 / 5.106!