ENC1-v3 issue : drops a frame every few minutes

I am seeing the following issues with the ENC V3:

Blacks are a little gray compared to my JTech encoder . LinkPi drops a frame every few minutes but is nearly perfect at 1080 60FPS. Running GOP at 2 seconds on LinkPi. Have upgraded to 2.7.0 build 20231031. Encode settings below. I am doing transport stream only. Thanks.

Try to enable “NTSC compatibility”

Encode > Vedio Config > NTSC