We have a number of web maps that we share via WAB apps in AGOL. The thing is, the attribute tables in the map are fast whilst the same attribute table in the app can be very slow in the Attribute Table widget - or completely fail to load. We've tried recreating new apps but it's consistent regardless of the app template.
See here for a webmap: https://nntt.maps.arcgis.com/home/webmap/viewer.html?webmap=6f9deaeef73f43b98f17b7e7490d0043
And here for the corresponding WAB App: ArcGIS Web Application
Has anyone else experienced the same issue?