Photon client objects behave strangely when colliding

With this question I would like to have clarified two issues. So, I have two client object controlled from my PC named Client1 and Client2.

Whenever I control Client1 and it collides with Client2 in the scene (supposing these clients are represented by two Spheres for example), Client2 starts to behave strangely. It moves irregularly up and down, right and left whatever, but this is only an effect I could see in the Client1 scene. From the point of Client2's scene, this doesn't move at all.

This may be a problem of sync, but I would like to know if anyone has encountered this problem before and how it was solved (to mention, I have attached a PhotonView Component).

This is not absolutely necessary, but how could I improve the movement smoothing of the client on each other client's scene?