thanks for the advice, but I keep waiting for a bit longer with the BIOS up.
I think it is not the best answer to every issue regarding this NUC to have the newest BIOS refreshed (as it is general in this forum everywhere) - comparing to ANY other HW device bought previously became the most annoying one with its strange problems.
E.g. my previous GigaByte motheboard from 2010 was NEVER ever upgraded with bios but never had any serious problem like this. (WIFI drop, sound card drop, BIOS liability and now this USB3 drive issue...)
So watching the forum news regarding the bricked NUCs after 0036 BIOS upgrade, I rather waiting for some more safe way to eliminate this.
Since my last comment about this special SKY16 USB3 docking, I tried a few docking stations without any problems - parallel SKY16 was tested on other "NORMAL" machines working OK.