Okay - this doesn't fix the problem - but just as a workaround:

Maybe you could download and try this in the PLE  Vue 6 Infinite version ?!
Where you trying to load the P7 props into a already bigger scene or are you trying to load the props into a new and empty scene ?!
If it would work in a fresh empty scene, you could save the props as Vue objects and then load them into your scene...
Or you could export your not working props already in P7 as wave-objects and use those in Vue ...
Or maybe some setting in the P7 preferences - misc. settings have to be activated/deactived to get better results ...

Well, only until working updates would be released ...