RPC Conflicts

Options
Hey Everone,

I am using photon cloud with unity.
I have a simple case where players can use a Unity UI Slider to change a variable in the level.
there is there a function which sends an RPC (all via master) to update the other players with the new value.
As part of the function that is called when the slider changes, it updates the slider position on the other clients (so that they are synced up).
This works great so long as players don't try to change the slider at the same time.

However if they do change the slider "at the same time" (meaning during the period that the RPC is being sent) then all hell breaks loose when the values constantly oscillates between the two options and unity freezes for all players.

What strategies do people use to make sure that this "death loop" does not get entered into?

Thanks for your help!