Jenkins job keeps waiting for next available executor forever (user dependent)
<p>Depending on the user who triggers the build, the build starts immediately or stays in the queue forever waiting for next available executor. The build node is completely free. The number of executors is 6. </p>

<p>I already tried:</p>

<ul>
<li>Disabling the blocking jobs</li>
<li>Configuring no blocking jobs at all</li>
</ul>

<p>The multijob project has project-based security, which allows the users to build, cancel, read and see the workspace.
The current configuration of my jobs already worked in the past.
The jenkins master is not the node for which a free executor is being waited (the job is tied to a slave).
The job is a <code>MultiJob</code> Project and starts many other jobs.</p>