From support ticket: I have something that is doable every three hours. Since ClickUp doesn't have hourly repeats, i went to set up separate tasks, one with a 00:00-03:00 start and due, the next with 03:00-06:00, etc for the full 24 hour coverage, eight tasks total. I started with the 09:00 task as that was the next one up when i started crafting them, set it up with normal, not legacy recurring every day. I then duplicated that task and modified the times for the next three hour window. And repeated, duplicate the latest task, modify times until i had all eight.
When i started to check off these tasks as complete, their next occurrences all came up as next day, 09:00-12:00 regardless of the times i had set them to.
It would be nice to have the option to have this available in recurring tasks.