The problem is UltraFine 5K Display becomes unusable when positioned within 6.6-feet of a router. I discovered this issue after purchasing my own UltraFine 5K Display last week and thinking something was defective with my hardware.
Right out of the box, UltraFine 5K Display was hardly usable as it would consistently disconnect and even freeze my MacBook Pro which made it unusable for work on Thursday and Friday. Connecting it to my MacBook Pro consistently resulted in needing to reboot my machine to continue working.
Yikes.