cron.max_running_jobs and reload config

When I try to change cron.max_running_jobs (with cron.use_background_workers = 'on') to any value and reload config I get incorrect error in log:

received SIGHUP, reloading configuration files
7 is outside the valid range for parameter ""cron.max_running_jobs"" (0 .. -1)
configuration file ""/var/lib/pgsql/17/data/postgresql.conf"" contains errors; unaffected changes were applied

Restart work fine.

With cron.use_background_workers = 'off' and the same, I get correct error message:

parameter ""cron.max_running_jobs"" cannot be changed without restarting the server