IPv6 was actually set to “off”. I have now set it to “automatic” and repeated step 3. Only this time I also disabled my Ext. in and outs in KymaConnect.
It works KymaConnect is fully connected according to the status display:)
Excellent news! Looks like there is no longer a reason to use the PacaDHCP work-around. You can re-enable your EXT Midi slots and just ignore the yellow status indicator. As long as the two LEDs near the Pacarana are green you have a working connect.