External Monitor Flashing RGBBW

[jdoodoo]

Trying to run my 2017 13" MBP with two external monitors (LG 27QP88D-B2). The monitors are connected to my MBP via USB-C cables directly into my Thunderbolt 3 ports. Having an issue where one of the monitors will randomly start flashing red, green, blue, black, then white repeatedly for maybe 10 seconds then the monitor returns to normal. It happens to both monitors, but never at the same time. Sometimes the screen will look normal, except it's shifting around slightly like it's adjusting. The monitors are 1440p 75 hz monitors, but I set them to 60 hz in display settings because that's all my MBP will support according to the specs from Apple. I've tried a lot of troubleshooting with the monitors, cables, and ports, but can't seem to isolate the issue. Issue does not occur when running a single monitor. Any ideas what could be the problem? Thanks in advance!