ThingWorx IndustrialConnection cause delay of updating the data tag in Kepware? (Pls don't move it)

(This problem has nothing to do with Manufactory Apps ,  and probably even has nothing to do with Kepware, Please DO NOT move it to that area)

Hi, 

I have 2 channels in Kepware and each channel has a device.  The data tag get updates well when both of the devices are on,  but once one of the device get shutdown,  the delay of the data tag of the other device becomes immediately obvious.   And if set the shutdown device to "simulate" mode,  then the delay of the other device become good.  

Since the devices are in separated channels , they should not have impact on each other.   But the IndustrialConnection  is shared,  would be the problem caused by IndustrialConnection ?   Like , the remote thing of ThingWorx keep sending heart beat request to IndustrialConnection  and the request queue become too long if the device get shutdown, which cause the delay of other device  become long ? 

===Version===

ThingWorx:  8.5.4

KEPServer: 6.8 V6.8.796.0 

Regards

Sean