A solitary Fenix 5 user is reporting "English" appearing as menu titles in my app, instead of my titles, like

when the title is "Quit?" using code:
var s_menu_layer = new Ui.Menu();
if (raceState == preStart){
s_menu_layer.setTitle(Ui.loadResource(Rez.Strings.resetTimer));
}
else{
s_menu_layer.setTitle(Ui.loadResource(Rez.Strings.quit));
}
s_menu_layer.addItem("Yes",:yes);
s_menu_layer.addItem("No",:no);
It is reported on other menus in the app as well. Bizarre?
(I'm using menu not confirmation to get the "Yes" as the first option).
Part-Number: 006-B2697-00
Firmware-Version: '15.00'
Language-Code: eng
ConnectIQ-Version: 3.1.5
[just checked] FW 15:00 was on limited release four days ago. I wonder if we're encountering a bug?