Operating system: Windows 10
Graphics card: Duel (x2) Radeon AMD RX540s (crossfired)
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen) 2.8 full release
Short description of error
Either gets to last tile or penultimate last tile and stops on some frames. Last/ second to last tile won't render even with fifteen minute wait, still waiting. Other tiles rendered in within a second. First frame this was a problem was frame 3. I have skipped ahead to other frames and about 25% have this problem of stopping on last/ second to last tile. Blender doesn't freeze or crash. In task manager blender CPU drops to less than 1% and stays below. This problem happens both when rendering in the blender application and with a batch file. I have upgraded GPU driver and problem persists.
Exact steps for others to reproduce the error
Try rendering frame 3. On my system, it gets to tile 899 and then stops before getting to tile 900.