I tried with NDI on/off, there is not so much that I can remove, because it's almost blank composition. What if add more layers/columns? Maybe it's my ethernet card.
Ok, looks like I found problem. I made this test comp with 109 * 20 solids) and one video (load any other). https://dropmefiles.com/s51rl All ok if transition time = 0. If transition time > 0 (like on layer 109). When I trigger clip, I should wait some time (5sec now), before I can trigger another c...