Delay between Sheet and Report

edited 12/09/19 in Smartsheet Basics

I have several rollups and am having trouble today where when something is updated on a sheet it is taking quite a while to update across to my rollup reports.

I noticed this when I added a dropdown option and again when I received an email update about a new item.  I could see the item in the sheet but not the rollup.

I haven't timed it but I'd say it's taking 15+ minutes to update.

Any clue?