No issues with Fusion.
This kind of thing is usually due to some problem between the Apex and your router.
Sometimes setting both the Apex and the router to a static IP address, rather than DHCP, can fix it.
Or switching to a hard-wired connection with an Ethernet cable, if possible.
Or wiring the Apex to a Powerline adapter that you plug into a wall power outlet.
I've also found that putting the Apex on a UPS can make a difference.