I had the same problem it was infuriating basically it would only let me have 2 of my 3 chrome spheres reflective at any time and when I tried to make the 3rd reflective one of the others would lose reflection.... I ended up changing the material of one to glass or something like that. Doing a small render, saving then loading up again changing it back to chrome and it now works fine! Vue does some very weird things ....My eyebrows almost fall off my head sometimes I am that puzzled!