RE: Rollup fields not refreshing after 12 hours
Please look into: docs.microsoft.com/.../define-rollup-fields
Modify rollup job recurrence
As a system administrator, you can modify the rollup job recurrence pattern, postpone, pause, or resume the rollup job. However, you can’t cancel or delete a rollup job.
To pause, postpone, resume, or modify the recurrence pattern, you must view the system jobs. More information View Rollup jobs
On the navbar, choose Actions and select the action you want.
For the Mass Calculate Rollup Field job, the available selections are: Resume, Postpone, and Pause.
For the Calculate Rollup Field job, the available selections are: Modify Recurrence, Resume, Postpone, and Pause.