WatchFace.initialize() bug for new added FR955 & FR255

Today I updated device definitions through SDK Manager and new devices have been added: FR955 & FR255 family.

When trying to test in simulator my developed watch face on new devices - it crashes & simulator is displaying a popup: "The currently running device does not support this function. Please see if there is a device update in the Connect IQ SDK Manager"

Through Debug Console I navigated to line of code which is causing that and this is Watchface class initialization in my watchface view e.g.:

function initialize() {
        WatchFace.initialize();
}
The workaround solution is to comment this line - but it was added for purpose and all other devices are working with it.
Is it a bug or feature (of newly added devices) ?
What do you think ?