There are two issues with custom recurring, here are the steps to reproduce it
- Set a due date for a task
- Now go to repeat and choose any custom week, month, the due date for the task resets to today
Another issue
- Click Custom in repeat, in the numbered drop-down, you have the ability to type a number, but it does not work. Eg: Type 3 and choose months or years or week etc, it will by default only take it as 1 month / year / week. However, if you choose the number from the dropdown, it does work
Operating System: Mac OS Catalina