It never processes as completed. It is a recurring task.
please tell me - what exact due date formats sis you use in this task.
Note - only formats listed on this page: https://todoist.com/Help/timeInsert are supported by Todoist. Unfortunately, in some rare cases an unsupported date is being accepted by the system, but makes it impossible to complete such task and makes the pending animation run infinitely.
In case you've used an unsupported date, please post it here so we can block it and avoid such issues in the future. Sorry for the inconvenience.
The code I used was "every other week" once I changed that it worked fine. Thanks.