Hi @maria.princi,
After some digging and experimentation I believe I was able to reproduce the results that you described.
I found that when I changed the Language settings on the ML2 to a language with a locale that uses a comma "," character for the numeric decimal separator, that the transform based message commands like Move, Scale and Orientation in the developer sample were failing to parse correctly when sent to another device.
I have updated both the source code and the build of the apk in the Shared Experience dev sample repository with what I believe is a fix to the issue.
After installing and running this updated version on to your devices, please let me know if that corrects the issue for you as well.