While rendering an animation (on a single machine, no DR involved) corona gets stuck on cleaning up between frames for hours. First time it happened, render got stuck for 10 hours, second time - 6 hours. Each time I just needed to move the mouse - just like the idle system state stops clean up between frames.
Corona version: 1.7
Full-speed, Non-debug, MaxSDK 2016
Build timestamp: Oct 24 2017 10:47:16
3dsmax 2016, win10, dual xeon v2 rig