[Brent Lind]

This is normal behavior, and the reason the linking function requires you to put the desk in "config" mode. Config mode is required for any function that may interrupt audio and is thus not a good idea during performance. The fact that it affected monitors is simply because it was on a passive split. An active split would likely have popped in FOH but not monitors. This is not to say a passive split is a bad thing, it's just a workflow thing to remember in the future.