In the ArcGIS Maps SDK for Javascript, using a map service with label classes filtered by the minimum and maximum scales display repeated in certain scale margins.
This issue is not reproducible in ArcGIS Maps SDK for Javascript 4.28 until 4.30. If you are still encountering this issue, contact Esri Support Services and reference this defect.
解决办法
Change the minimum or maximum scales of the label classes.
Use a feature layer.
Do not use ArcGIS Maps SDK for Javascript 4.28 or 4.29.