I just updated to CC2026 including the ACR 18.0. But I've noticed that when I opened a raw-file and during the selection of a preset a messsage appeared that the support of the GPU is stopped due to an unknown failure. This happened nearly all the time, sometime only after the third file.
When this issue appeared I've to restart not only ACR but also Bridge.
My operation system is Win10 with the lastest updates.