Not a bug
https://www.todayindestiny.com/eververseWeekly
It was never going to be featured in the store this week.
The above link shows all items that where/are available from eververse this season.
That does not answer the question I had still as to why the other two featured banners which allow direct purchases of the items even when those specific items are ALSO not in the store this week. I appreciate the attempt to help clarify the issue, I already knew that the Rimskipper Sling was not available in the bright dust section or Seasonal Offerings.