That is correct, issue also exists with the ilnuxserver steamos image and games on whales via docker compose. I just used steam-headless as an example, but i've tested it with various containers on unRAID. All of them have the exact same problem of running denuvo games using the default unraid kernel; custom kernels do not have this issue nor running the same containers on an ubuntu host with any of the available repo kernels (-prime, -lts, -rt).