Bugged mooshrooms from converted world

I converted a survival world world to the bedrock edition that had some mooshrooms on it. When I tried to breed them with wheat, it didn’t work. I decided to investigate further and used a bowl on them but I didn’t get any mushroom stew. They also wouldn’t produce any milk. I could punch them and that worked fine but everything else didn’t. I tried the same things on a normal cow and everything worked fine. Then, on a separate creative world, I tried breeding mooshrooms and it worked. I don’t know what’s going on and I turned my mooshroom island to grass so I can’t get more mooshrooms without breeding. Please fix this.