Rebot --merge returns rerun report only - automation

Question

I'm using this shell script in my jenkins file for running my scripts. I implemented rerun and rebot for merging of reports
${Run_Type} = pabot
${REPORT_FOLDER} = output directory
steps {
script {
dir("${NODE_WORKSPACE}") {
try {
sh "rm -rf ../${BATCH_TARGET_DIR_NAME}"
def exitCode;
if(params.Tags == null || params.Tags.isEmpty()){
exitCode = sh script: "${Run_Type} -d ../${REPORT_FOLDER} -v browser:headlesschrome -v webdriver.chrome.driver:chromedriver -i ${TestGroup} . || \
${Run_Type} -d ../${REPORT_FOLDER} --rerunfailed ../${REPORT_FOLDER}/output.xml -o rerun.xml -i ${TestGroup} . || \
rebot -o ../${REPORT_FOLDER}/final.xml -r ../${REPORT_FOLDER}/report.html -l ../${REPORT_FOLDER}/log.html -R ../${REPORT_FOLDER}/output.xml ../${REPORT_FOLDER}/rerun.xml", returnStatus: true
}
else{
exitCode = sh script: "${Run_Type} -d ../${REPORT_FOLDER} -v browser:headlesschrome -v webdriver.chrome.driver:chromedriver -i ${Tags} . || \
${Run_Type} -d ../${REPORT_FOLDER} --rerunfailed ../${REPORT_FOLDER}/output.xml -o rerun.xml -i ${Tags} . || \
rebot -o ../${REPORT_FOLDER}/final.xml -r ../${REPORT_FOLDER}/report.html -l ../${REPORT_FOLDER}/log.html -R ../${REPORT_FOLDER}/output.xml ../${REPORT_FOLDER}/rerun.xml", returnStatus: true
}
if (exitCode != 0) {
TEST_RESULT = "FAILURE"
throw new Exception("exitCode " + exitCode);
}
} catch (Throwable e) {
throw e
}
}
}
}
Here's the deal:
rebot -R (--merge) xml reports is working when test cases are still failed after rerun.
successful_merge_report_because_rerun_still_failed
But when I rerun and the test case/s are passed, rebot --merge/-R don't even run on jenkins
Report displays only the rerun report and I noticed that rebot --merge didn't even run on my jenkins console output
I'm thinking maybe there's a problem with the logic of my shell script since it's working when test cases are still failed after rerun.
here is an isolated one line of my shell script:
sh script: "${Run_Type} -d ../${REPORT_FOLDER} -v browser:headlesschrome -v webdriver.chrome.driver:chromedriver -i ${TestGroup} . || ${Run_Type} -d ../${REPORT_FOLDER} --rerunfailed ../${REPORT_FOLDER}/output.xml -o rerun.xml -i ${TestGroup} . || rebot -o ../${REPORT_FOLDER}/final.xml -r ../${REPORT_FOLDER}/report.html -l ../${REPORT_FOLDER}/log.html -R ../${REPORT_FOLDER}/output.xml ../${REPORT_FOLDER}/rerun.xml", returnStatus: true