BUG-000142829 for ArcGIS Online

Bug ID Number	BUG-000142829
Submitted	September 10, 2021
Last Modified	July 23, 2026
Applies to	ArcGIS Online
Version found	9.2
Operating System	Apple iOS
Operating System Version	15.x
Status	Known Limit

Additional Information

Closing as a known limit when using large layers on iOS. Please open a new support case if still experiencing this issue with the latest version of the SDK. iOS browsers operate within memory and resource limits enforced by iOS and WebKit. Application complexity, which includes the number of layers, the number of features, symbology, imagery, client-side processing, and widgets, as well as 3D visualization, can significantly affect memory consumption and performance.

Workaround

Here is a guide topic with a list of techniques for working with large, dense datasets: https://developers.arcgis.com/javascript/latest/visualization/high-density-data/