Issue exporting video via Media Encoder with green screen multicam tracks. Subject turning cartoonish weird black, yellow, pink and blue. See screen shot. Happing with different export presets. This bug does not happen when I export the same video straight from Premiere.

Mulitcam track consists of:
1 4k 23.976 clip from nikon d850 dslr (this is the clip shown in the screen shot) Have Lumetri Color and Ultra Key effects applied.

1 1080p 23.976 clip from nikon d800 dslr (this clip is uneffected)

Running Catalina 10.15.6 (19G2021)
iMac (Retina 5K, 27-inch, Late 2014)
4 GHz Quad-Core Intel Core i7
32 GB 1600 MHz DDR3
AMD Radeon R9 M290X 2 GB

Media Encoder 14.3.2 build 38
Premiere 14.3.2 build 42

Many thanks for the support!

George