@pe1chl @neil I think I know what the problem is with your kits starting up. The V3 dongle had a design modification in the fall. In order to offer better HF reception, a passive was changed, which impacts current draw on start.
For the E4000 and older V3, boot in power seems to work without issue. Sorry about that. I just leave about that a few weeks ago and I forgot to mention it here.