This is like that since Vue 4 Pro. I am sure there is a reason why it is not corrected yet. It was reported with 4 Pro already. I simply do the final material things only when all the posing is done in Poser so that the object is final in Vue. The best way to work around this little thing. I even then destroy the connection to Poser by ungrouping the object for example or saving the model as vob and reload that then. Otherwise you have to keep the pz3-file till the end of your days, otherwise the vue-file will not load anymore because it can't find the pz3! lanaloe77 is right. Collapse materials then it might be easier - you deal with not so many materials anymore.

One day your ship comes in - but you're at the airport.