Of course, the post announcing why it’s disabled makes it clear why the login reward was temporarily disabled; it had an incorrect drop table that was likely to cause problems and will be fixed and unlocked in the next patch. All the same, it’s not exactly an elegant way to solve the problem, considering that even those meticulously watching their inventories will be affected with no hint about why. So right intent, perhaps, but wrong execution.
Source: Official Site; thanks to Wilhelm for the tip!