Yeah, also can't think of any way for a device on the network would do that, especially only to some of the miners. Do the miners go down when you turn the laptop back on?
yes they do. Also no problems when the lap[top is off the network. It has been running smooth ever since 5-6 days now.
Query: Are the miners and laptop using DHCP or static IP addresses? If they are static addresses perhaps the laptop is using the same address and causing a conflict somewhere.