Adding a polygon layer to ArcGIS , enable its popup and click it. The outline is way off and misaligned and warped in shape. Works fine in the 3.25 sandbox though. Thus it would seem AGOL introduced a geometry simplification issue. One solution Esri could use to rectify it would be to re-draw it on a zoom-in event so that the geometry could be simplified at small scale and re-drawn with more vertices if zoomed in to.
Anyone else seeing this? Looks like a severe AGOL bug. I also saw the effect on services from our 10.51 and 10.61 servers, both from SDE in state plane and a GDB in web mercator respectively.
Waiting to hear from AGOL support team.