[Packetbeat] Overview ECS dashboard TypeError: t is undefined (http://myhost:5601/bundles/vendors.bundle.js:390)

[djbios]

Kibana version:
Version: 6.5.3
Build: 18855
Elasticsearch version:
6.5.3
Server OS version:
4.15.0-91-generic #92-Ubuntu
Browser version:
Chrome Version 80.0.3987.149 (Official Build) (64-bit)
Microsoft Edge 44.17763.831.0
Firefox 74.0 (64)

Original install method (e.g. download page, yum, from source, etc.):
docker image
Describe the bug:
TypeError: t is undefined (http://myhost:5601/bundles/vendors.bundle.js:390)
Steps to reproduce:

1. Set up packetbeat in docker image on same host
2. set setup.dashboards.enabled: true
3. navigate to [Packetbeat] Overview ECS dashboard

Expected behavior:
Dashboard works
Screenshots (if relevant):

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):
All fine in kibana container, no errors.

[elasticmachine]

Pinging @elastic/integrations (Team:Beats)