Bitsquare freezing with high CPU utilization

It started with Bitsquare responding slowly to UI navigation. Let it run unattended for a few hours and found it was utilizing all cores:

Tried first a clean shutdown. Waited 10 minutes and then did a KILL. It started up fine again though.

Not sure how to file this as a bug. What are the relevant logs to look at?

Seems my last reply did not get through…
I added bounty task for investigating: