Possibly duplicated notifications from multiple categories #121
Description
While looking through some old emails (July 2024) I spotted a digest that should have had 2 categories with 1 notification each, but actually showed both categories as having both notifications in them. The subheading for the category (both of them) nonsensically said "1 notification in 2 threads". The contents of each category were identical, both showing the same 2 notifications.
This is from a while ago so it's possible that it's fixed now, but I don't remember doing it.