Glad to hear that!
Waze country borders don't always match the "official" ones. You probably notice it when you move the map around when you have Toolbox (or others) script installed. Therefore we get unexpected results..
Here, it happens even far away from the border (maybe close to editable area boundary)
The difficulty is to guess what Waze expect us to feed in to avoid those errors..

Could it be something simple causing a conflict - like being outside your Editable area? Do you have that layer enabled?

Also, have you tried another browser/incognito session?