Custom Items Resetting in World Editor

[Spitekilled2]

So I re-opened an old project since I saw blizz are adding Custom Campaigns again. Whenever I save and re-open the Custom Campaign all custom models and Items reset back to their original form. Any reason this is happening?

 

[komoset]

I think that's a bug on the PTR right now

 

[Spitekilled2]

I think that's a bug on the PTR right now

Ok ty.