CircleCI intermittently not running

LEMP stack. Circle CI stopped running for one user. We have 4 devs and circleCI kicks off for PRs for all but one dev. Furthermore, the failure to kick off seems to be intermittent:

There are no changes in the out circle.yml between these PRs. Anyone run into something like this before?

It seems as though having circleCI start following my fork of the main repository made it stop kicking off in the main repository.