ArcGIS - AGOL / Enterprise,
We tried overwriting a Feature Service after adding a new layer in the mxd from ArcGIS Enterprise and the New layer does not show up in AGOL Web Map used for Web AppBuilder or Operations Dashboard.
We are not adding or removing layers and overwriting services until this is resolved.
Logged esri support ticket referencing this bug reproducible at 10.4.1 and 10.6.
#BUG-000115558