System changes my config, dropping environment variables

On one particular job, my changes job config are overwritten by SYSTEM.

I can restore my config in the Job Config History, I can edit the restored config but next time I build, SYSTEM changes my config again.
The change occurs before the build causing the build to fail because it missed the required environment.

I haven’t seen this on other jobs yet, but I don’t dare to touch others in case this starts happening there as well. Did a test on on other, SYSTEM also updates the config, but on that job it does not drop the environment.

Below is my config, DROPPED CONTENT indicated the content that is removed by SYSTEM

<?xml version="1.1" encoding="UTF-8" standalone="no"?>
<flow-definition plugin="workflow-job@1348.v32a_a_f150910e">
  <actions/>
  <description/>
  <keepDependencies>false</keepDependencies>
  <properties>

<!-- DROPPED CONTENT START -->
    <hudson.plugins.jira.JiraProjectProperty plugin="jira@3.11">
      <siteName>https://ccebe.atlassian.net/</siteName>
    </hudson.plugins.jira.JiraProjectProperty>
    <org.jenkinsci.plugins.workflow.job.properties.DisableConcurrentBuildsJobProperty>
      <abortPrevious>false</abortPrevious>
    </org.jenkinsci.plugins.workflow.job.properties.DisableConcurrentBuildsJobProperty>
<!-- DROPPED CONTENT END -->
    <hudson.model.ParametersDefinitionProperty>
      <parameterDefinitions>
        <hudson.model.BooleanParameterDefinition>
          <name>DebugPCT</name>
          <description>set debugPCT flag on ant</description>
          <defaultValue>true</defaultValue>
        </hudson.model.BooleanParameterDefinition>
      </parameterDefinitions>
    </hudson.model.ParametersDefinitionProperty>
<!-- DROPPED CONTENT START -->
    <EnvInjectJobProperty plugin="envinject@2.908.v66a_774b_31d93">
      <info>
        <propertiesContent>CCEBUILD_PLATFORM=windows
CCEBUILD_NODE=develop_devts
CCEBUILD_APPLROOT=**********************
# CCEBUILD_LOCALDATADIR=******************
CCEBUILD_DUMPLOCATION=*****************</propertiesContent>
        <secureGroovyScript plugin="script-security@1275.v23895f409fb_d">
          <script/>
          <sandbox>false</sandbox>
        </secureGroovyScript>
        <loadFilesFromMaster>false</loadFilesFromMaster>
      </info>
      <on>true</on>
      <keepJenkinsSystemVariables>true</keepJenkinsSystemVariables>
      <keepBuildVariables>true</keepBuildVariables>
      <overrideBuildParameters>false</overrideBuildParameters>
    </EnvInjectJobProperty>
<!-- DROPPED CONTENT END -->
    
  </properties>
  <definition class="org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition" plugin="workflow-cps@3802.vd42b_fcf00b_a_c">
    <scm class="hudson.plugins.git.GitSCM" plugin="git@5.2.0">
      <configVersion>2</configVersion>
      <userRemoteConfigs>
        <hudson.plugins.git.UserRemoteConfig>
          <url>https://*****************************</url>
          <credentialsId>***************************</credentialsId>
        </hudson.plugins.git.UserRemoteConfig>
      </userRemoteConfigs>
      <branches>
        <hudson.plugins.git.BranchSpec>
          <name>mybranch</name>
        </hudson.plugins.git.BranchSpec>
      </branches>
      <doGenerateSubmoduleConfigurations>false</doGenerateSubmoduleConfigurations>
      <submoduleCfg class="empty-list"/>
      <extensions/>
    </scm>
    <scriptPath>localdatabase.jenkinsfile</scriptPath>
    <lightweight>true</lightweight>
  </definition>
  <triggers/>
  <authToken>BUILD_DB_TOKEN</authToken>
  <disabled>false</disabled>
</flow-definition>
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The job invokes a jenkinsfile that contains

properties([
  parameters([
     booleanParam(name: 'DebugPCT', defaultValue: true, description:'set debugPCT flag on ant'),
  ])
])

This is probably what causes the update. Don’t know why it drops the environment variables