In June I bought an LG 24" Ultra Fine 4K from Apple that came with 2 cables: USB-C and Thunderbolt 3. Neither of these cables works properly with a 2018 MacBook Pro 15" from my employer; Couldn't establish a stable connection to the monitor. Since these cables provide a stable monitor connection with no issues when used with the latest MacBook Air and Macbok 12", I suspect the cables and monitor are fine and I blame the MacBook Pro. I had an Apple -Support ticket and they forced me to reinstall the OS.It didn't fix the monitor connection and my employer ended up sending me a newer MacBook Pro.This new model has the same problem and I got LG to fix it. But since it will be very troublesome to send it back. This monitor made me decide to test the theory that the cable could just be bad even if it was bundled with the monitor. With this cable, the connection of the monitor is stable. Conclusion : The cables that come with the monitor cannot be used with every monitor, LG has discounted a very poor quality monitor and a very expensive monitor included.