Well imagine the app was made just for the operating system and not the devices, so when something weird happens on a device, it's probably because of the different specs and screen sizes. However I don't think Fizzer (Warlight creator) will do anything about since what you described only happens when you zoom. So I guess just get used to it? (Something similar happens when I use my IPad and it's annoying but it's whatever.)
Also I guess you could report it.
HTTPS://www.warlight.net/reportbug