I just checked and my optional tasks finally moved forward to next weekend, but not until Tuesday morning. All day Monday they were still shown as being Past Due for the previous Saturday (and this was after you all checked). So, it finally worked, but a little late. I'll keep an eye on it.
Sorry, it's not fixed. I have a variety of optional (daily, weekends, monthly, etc.) that are not moving forward at all, let alone not moving forward enough. Timezone is correct and ? in front. These haven't worked in about 2 or 3 months.