The US are on a separate server and points do not transfer from the North American server to the International server. They will be back when you go back to the US. See the Waze help: https://support.google.com/waze/answer/6270859?hl=en
I am one of those 1% in my country (top 300). When i recently visited united states i of cause used my Wase app. What i notised was that i started from zero. Fine, no problems with that.
But what happened when i come home is that i am still a “novice”. Does that mean i should start from the beginning again or what?
Same to me. Few months back I came to live in US and since then I lost all my points. Back to baby.
Seems this issue was not fixed. Along with several critical failures that I have when trying to use Android Auto and Waze, this status issue is liquidating my willingness to use Waze any more, specially when Google Maps works so good in US.