jobs built by build64.livna.org getting stuck at downloading/done

Hi, I tried building sdlmame today and jobs 1556 and 1557 got stuck at downloading/done on build64.livna.org. I tried requeueing 1556 but the results were the same. If the job sits there long enough, it will fail with something like "unable to download results from builder, please contact system administrator". I hit similar issue with mednafen, but in that case requeueing worked just fine. Any ideas what is going wrong in here? Julian