The Problem

Fl_Sys_Menu_Bar menu item shortcuts using Escape or Tab do not work properly on Mac.
The shortcuts display incorrectly in the menu and the keyboard shortcuts do not invoke the callback.
This works correctly in Windows and Linux.

"Escape" is displayed in the menu as a semicolon (;) and "Tab" is displayed as a closing parenthesis ()).
Note that neither Escape/Tab nor semicolon/parenthesis invoke the callback.

It's possible that this is just user-error on my part but that seems pretty unlikely.
I couldn't find any bug reports of a similar bug so I wanted to submit this and see if there is any known workaround.

Thanks!

Screenshots

Mac

Windows

Linux

The Code

For Escape:

OS_MENU_ITEM("&Stop", FL_Escape, (Fl_Callback *)stop_cb, this, FL_MENU_DIVIDER),

For Tab:

OS_MENU_ITEM("&Next Channel", FL_Tab, (Fl_Callback *)next_channel_cb, this, 0),
OS_MENU_ITEM("&Previous Channel", FL_SHIFT + FL_Tab, (Fl_Callback *)previous_channel_cb, this, 0),

where OS_MENU_ITEM is a convenience macro defined as:

#ifdef __APPLE__
#define OS_MENU_ITEM_PREFIX ""
#define OS_MENU_ITEM_SUFFIX ""
#else
#define OS_MENU_ITEM_PREFIX " "
#define OS_MENU_ITEM_SUFFIX "         "
#endif

#define OS_MENU_ITEM(l, s, c, d, f) {OS_MENU_ITEM_PREFIX l OS_MENU_ITEM_SUFFIX, s, c, d, f, FL_NORMAL_LABEL, OS_FONT, OS_FONT_SIZE, FL_FOREGROUND_COLOR}

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