Disk recycler does not work in case of folder structure in Jenkins

If we have folder structure implemented in Jenkins, then disk recycler does not clean up the disk and build gets failed due to low disk space.
https://github.com/jenkinsci/diskcheck-plugin/blob/master/src/main/java/org/jenkinsci/plugin/Diskcheck.java#L163
This check gets failed and it goes to the else part and does not delete any data.
Is this known issue with the code ?