See Lar_q's explanation above for the delay. Also, even if MS didn't have limits on the size and number of patches that could be released for Xbox games, so Larian could put out single-issue bug fixes as soon as they were isolated and fixed, the publisher has a test procedure period, as does MS, so it would still take a month.
I believe Dungeon Master's point was that most people did not encounter this problem, and it requires are particular playstyle from the player to trigger (ie spending a long time in the game or leaving it paused for a long time). It is not the player's fault that it happens, but it is within their ability to avoid if they know about the issue in advance.
