fix model cloning bug
fix model cloning bug

aidinabedi/playcanvas-engine,sereepap2029/playcanvas,guycalledfrank/engine,sereepap2029/playcanvas,aidinabedi/playcanvas-engine,playcanvas/engine,H1Gdev/engine,playcanvas/engine,sereepap2029/playcanvas,guycalledfrank/engine,MicroWorldwide/PlayCanvas,MicroWorldwide/PlayCanvas,H1Gdev/engine