Logger related(?) error at top of console after reset

I noticed this line at the top of my nexus.log when I restarted my nexus:
'ERROR in ch.qos.logback.core.joran.action.PropertyAction - In <property> element, either the "file" attribute alone, or the "resource" element alone, or both the "name" and "value" attributes must be set.'

Earlier I had rebuilt and written up NEXUS-9350 and not done anything else noteworthy. I was subsequently able to repro this by building a new nexus, starting it, resetting logs to default level and restarting nexus.
As far as I could tell this did not occur on the initial post-install start.

I did not check older NX3 or NX2 at this time.
Debug was off during this test.