Does Charts stop executing for few seconds during Comm Failure Events?

I am trying to understand what causes this behaviour during the event described below.

[U][B]Test Setup:[/B][/U]

[B]PacSim Ver. 8.5[/B] on PC communicating with an EB-1 Brain with Ver. 9.x firmware.

[B]PacControl Pro 8.5[/B] - 1 Looping Chart (1Sec delay between loops) executing in debug mode while monitoring a single variable that increments each second.

When Ethernet cable is disconnected from PacSIm PC to EB1, Chart stops incrementing the “Seconds” variable indicating the chart has stopped executing.

[B]Is this Normal behavior eventhoug the chart has no dependency on EB-1 remote rack?[/B]