It looks like this user was having the same issue:
https://forum.corona-renderer.com/index.php?topic=13142.0The render submission started at 10:25am yesterday. I came in today and it said it had only been rendering for a few hours. The 'Started' time in the job summary was 6:29am this morning. I'm assuming that it's restarting when it finishes. In the errors it says "3dsmax adapter error : Ping task timeout." at 6:25am.
Is there a chance that it wrote the file before it restarted? It's not in render output path. I checked the 'Jobs' Backburner folder and there's a .zip that's about half a gig, but it looks empty and extractors don't recognize it. Could it be hidden in there somewhere?
edit: I'm using the noise threshold to stop the render.
Corona version: 3
Full-speed, Non-debug, MaxSDK 2019
Build timestamp: Nov 21 2018 16:42:00