It’s (another) Adobe bug. When building a menu entry in the UI, an & is used to define the hotkey for that menu entry, e.g. Glyph &Panel will make that menu entry react to pressing the P key. The & itself is not displayed in the result. The CC apps don’t take that into account, so the & always disappears. They would have to escape it in the input for building the menu entry.
We reported that bug years ago, but nothing happened yet.
Wondering what other things one can put in the label that will be handled unescaped. May if someone found something that can be labeled as a security bug it will be finally fixed.