I'm doing a Methlabs WAB-built map.
My MXD has layers that look like this:

This symbol has the following settings:

But the Web Map in AGOL and WAB both look like this:

Here is the REST Service:
JSAPI/tpd_Methlabs (MapServer)
Anyone have any ideas?
Brain,
When you publish the service from ArcMap make sure that you have text antialiasing turned off:
Currently you have