Disappearing sprites in Fate/Extra

[jbslash]

I'm afraid I still can't make a proper debug log. Even If I try to catch the very moment before the sprites disappear and enable debug logging, the game just stops (like "freezes", but continues if I disable the logger) and the log file just rapidly increases in size. As the very moment of that glitch cannot be catched with the logger working, I doubt that log file (~400 MB after three or four minutes of waiting) could be of any use.