Error condition when serpentine used

Seems that every time I attempt to serpentine a trace on L3_SIG1 the editor restarts with a message “Unexpected Condition”. It’s happened 3 times in a row now. Any idea what’s going on?

There is a bug when serpentines are used with a particular trace configuration. We are testing a fix for the issue right now. It should get deployed in the next 20-30min.