it’s been pretty well-documented that hubs are NOT recommended for using w/ the QC. Some of us have had success with self-powered hubs, but they’ve been very clear in the Manuals and instructions to avoid using hubs where possible.
I have exactly the same issue. Removed the HUB from chain, it became a bit more stable. But still with occurrences of the issue.
Maybe the USB B to USB C adapter.