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UV MORPH PROBLEM – PLS HELP

HI!
My method that I was using since a few years was that I Zremeshed my models, I used UV Master with the Zremeshed model & after that I have projected back the details to from the original model.
A few days ago it stopped working & cannot export my models to Substance, etc with proper UVs. When I click on Morhp UV after the UV Master unwrapping it displays a messed up “uvmap” like this on:


If I hit Flatten in Uv Master it shows a proper map like this:

What could be the problem? Thank you for helping!