At some point after 4pm EDT on Tuesday March 15th, we started receiving reports of embedded QuickSight dashboards stuck in an endless loop, constantly refreshing the same widgets over and over again. Our frontend developer has informed me this appears to be caused by QuickSight constantly triggering
loadCallback with no delay time in between calls. This causes the browser tab to use up all available resources and eventually hang, as well as making all dashboards unusable. This appears to be restricted to just dashboards that have a Table display in them (other dashboards that only include visuals without tables appear to be unaffected at this time)
We’re fairly confident that this was working earlier in the day, even as late as 3:55 PM EDT.