LG have some truly great monitors, but their latest flagship 5K display that they teamed with Apple on has been faulty for many owners since launch - but the new batch, is now fixed.
The new UltraFine 5K monitor that works in tandom with Apple's latest MacBook Pro has been experiencing graphical issues, as well as other weird problems, and now the problem has been found. If the shiny new 5K display was placed too close to a router, the monitor would have issues that could end in your MacBook Pro going through a hard reboot. If the 5K display was disconnected and reconnected, the issue went away for the most part.
LG has since released a statement on the 5K monitor issues, where they said: "LG apologizes for this inconvenience and is committed to delivering the best quality products possible so all LG UltraFine 27-inch 5K displays manufactured after February 2017 will be fitted with enhanced shielding".