Mac Catalyst apps crashing with External Monitor.

Hello, after spending some time, I have narrowed it down to being caused by the use of an external monitor.

Mac Catalyst apps on macOS Big Sur (10.11 / 10.16) crash when launched from an external monitor as the main display.

System: MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports) (BETA 2)

External Monitor: LG 34GK950F

• 1440p

• 144hz

• 1ms

• HDR

This affects all Mac Catalyst apps including Voice memos, Twitter for Mac, Maps etc.

Crash log: pastebin.com/raw/sYc7dKEd