improve coarsening robustess

8 jobs for v-0.3.1 in 2 minutes and 4 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Build
passed seamshbuild-linux #73296

00:00:31

passed seamshbuild-osx #73298

00:00:32

passed seamshbuild-windows #73297

00:00:33

 
  Test
passed seamshtest #73299

00:00:45

passed seamshtest-py36 #73300

00:00:59

 
  Deploy
passed pages #73301

00:00:29

passed pages:deploy

00:00:00

passed seamshdeploy #73302

00:00:30