Missing builds in build history

In one of our instances, random (at least it seems random) jobs are not being displayed in the build history section:

In /var/jenkins/home we can see that the build folder was created for #751, but it contains less files than one that shows up in the interface:
/var/jenkins_home/jobs/jobName/builds/751 :
This is what we can see (confidential data removed, of course):

versus a build that is visible in the interface:

Why could the build #751 not show up in the interface?

Thank you!