TCL 55R615 Screen Flickers Red

I have a TCL 55R615-CA, and after setting it up on a wall mount I noticed the screen seemed to have a flicker, particularly when displaying significant areas of white. I took a slow-mo video of the screen with my iPhone to see if I could tell what was going on. It appears that the screen flickers between full color and monotone-red (which is why it wasn’t immediately apparent on the Roku menu screens).

I’ve tried doing a display setting reset, a factory reset, unplug/re-plug, and adjusting each of the display setting when on a specific input with no appreciable change in the flickering. Is there something I can do to fix this?