Forge glitchy textures when playing multiple maps!

so when i play one of my maps its fine…but when i swap em to a different map most objects copy the same textures as the previous map! and it wont ever go away unless i close and open the game every map change!
please someone help with this as i worked hard for only textures to cross over to the next map (not permanently)
343 plz plz see this to fix this issue asap