ArcGIS Vector Tile Style Editor: Gaps in Land Layer at Level 10

[Eastern_ShoreGIS_Cooperative]

Trying to edit the Dark Gray Canvas for a custom basemap that does not have buildings...

I successfully saved the new tile layer, but upon inspection there is a sliver cut out of the [land] layer at zoom level 10:

Look just SW of the Pocomoke City label

Here is level 9:

And level 11:

The same gap in the basemap shows up on other styles, such as World Street Map (night) and Light Gray Canvas.

I believe there is an issue with the cache for [land] at level 10.

Thanks!