Network crash if target machine sleeps during transfer?

[xderpxa]

Hi, i seem to be having a problem with crashing while transferring files.

I've found that during a transfer, if the other machine that the system is copying to goes to sleep or auto logs out due to inactivity, it causes Free File Sync to freeze up and stop responding. It also seems to make it so no networking of any kind can happen until the system is rebooted. It even kills the systems WiFi and the devices can not be disabled in the Control Panel.
Rebooting solves the problem, but how can i make it so FreeFileSync tells the other system to never sleep during a copy or something so this issue doesn't happen? Thanks.

Basically
Laptop1 is copying files to Laptop2
Laptop2 goes to sleep mid-way through the transfer
Laptop1's FreeFileSync freezes, and all network capabilities are killed until Laptop1 is rebooted.