Disable cron-restart not working

pm2 v4.5.6
node.js v14.16.1

I'm trying to disable cron-restart using this command (as mentioned here: https://pm2.keymetrics.io/docs/usage/restart-strategies/) but is not working

pm2 restart app --cron-restart 0

I got this error:

Use --update-env to update environment variables
[PM2] cron restart at 0
/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/lib/API.js:1611
      delete appConf.args;
      ^

TypeError: Cannot convert undefined or null to object
    at API._handleAttributeUpdate (/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/lib/API.js:1611:7)
    at API._operate (/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/lib/API.js:1328:19)
    at API.restart (/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/lib/API.js:521:12)
    at /home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/lib/binaries/CLI.js:373:11
    at /home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/node_modules/async/internal/withoutIndex.js:8:40
    at replenish (/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/node_modules/async/internal/eachOfLimit.js:81:17)
    at /home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/node_modules/async/internal/eachOfLimit.js:86:9
    at eachLimit (/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/node_modules/async/forEachLimit.js:47:43)
    at awaitable (/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/node_modules/async/internal/awaitify.js:13:28)
    at Command.<anonymous> (/home/ubuntu/.nvm/versions/node/v14.16.1/lib/node_modules/pm2/lib/binaries/CLI.js:372:5)

Am I doing something wrong? How can I disable con-restart?

Start by reproducing pm2 restart app --cron-restart 0 on the reported restart path, then inspect lib/API.js around line 1611 and the callers in lib/API.js and lib/binaries/CLI.js shown in the stack trace. Done means disabling cron restarts no longer throws TypeError: Cannot convert undefined or null to object and the command completes successfully.