Hi Sergei,
I learned today that we do not allow UAV overlapping for multiple queues because this is technically not supported by D3D12 as an API. Although it looks like it works on your setup, depending on the driver and GPU your users might have, this is not guaranteed to be valid usage, which can lead to stability issues. Therefore, we will likely not enable this feature on D3D12 on PC platforms, and I would advise you to do the same. I hope that clarifies your questions, but please feel free to reach out if anything is unclear.