With the recent update to the parent pom, this brought along the maven-frontend-plugin version 1.4.

Unfortunately that means that lint failures run as a testing phase were ignored: 

https://github.com/eirslett/frontend-maven-plugin/commit/39bcb48ea6e248776bdd9fc189406ba690739257#diff-f28d4bf058f4adf52359a52fb6841edfR118

which has a side effect of bundling failing (and ATH failures). 

Lint should be run as an earlier phase 

(and we probably should fix the version of the front end plugin to avoid surprises in future).