I "apt dist-upgrade"-d my build Jenkins server, and was updated from 2.204.4 to 2.222.1, and now I am running into issues.

The major issue is that my throttled builds do not work. I have a build (see attached creenshot)
that is configured with throttling:

<hudson.plugins.throttleconcurrents.ThrottleJobProperty plugin="throttle-concurrents@2.0.2">
<maxConcurrentPerNode>1</maxConcurrentPerNode>
<maxConcurrentTotal>1</maxConcurrentTotal>
<categories class="java.util.concurrent.CopyOnWriteArrayList">
<string>vm-installer</string>
<string>kickstart-repo</string>
</categories>
<throttleEnabled>true</throttleEnabled>
<throttleOption>category</throttleOption>
<limitOneJobWithMatchingParams>true</limitOneJobWithMatchingParams>
<matrixOptions>
<throttleMatrixBuilds>false</throttleMatrixBuilds>
<throttleMatrixConfigurations>true</throttleMatrixConfigurations>
</matrixOptions>
<paramsToUseForLimit></paramsToUseForLimit>
<configVersion>1</configVersion>
</hudson.plugins.throttleconcurrents.ThrottleJobProperty>

It is set up to build on a single node:

<hudson.matrix.LabelAxis>
<name>label</name>
<values>
<string>kickstartbuild</string>
</values>
</hudson.matrix.LabelAxis>

The pop-up says that is waiting for the next available executor, which is "master", which is the only one satisfying this label. It is idle, but Jenkins is still waiting.

The configuration worked fine before upgrading. Restarting Jenkins does not help.