High Sierra Release version FCP X bug with L.G 5k monitor

Im using a Macbook Pro 15' Macbook 2016 with Radeon 460 (Intel HD Graphics 530). Its connected to the LG 5k monitor that Apple sells via USB-C. When the monitor is connected and I start FCP-X (latest version 10.3.4 on the first official release of High Sierra 10.13 FCP-X will either quit immediatley or hang when launched and not finish the launch. However when the monitor is disconnected FCP-X launches without any problems.

Version/Build:

FCP X 10.3.4

High Sierra 10.13 (17A365)

Configuration:

15' Macbook 2016 with Radeon 460 (Intel HD Graphics 530) connected to the LG 5k monitor