Why not power the hub from SATA, especially if you think the problem is related to the output current capacity of the Dark Hero USB port(s).
The only reason is that I have all Aquacomputer devices on Hubby and Leakshield is one of them, I switch to SATA on Hubby the Leakshield will not work anymore when PC is shutdown, I have to move Leakshield to an internal USB port and after I can switch to SATA for Hubby. I doubt it will fix the problem since I had D5 Next on internal USB port and still got the same issue with it.