Real-time monitoring

SYSTEM INFORMATION
OS type and version Ubuntu Linux 20.04.6
Usermin version 2.202
Virtualmin version 7.30.4
Theme version 23.02
Apache version 2.4.41
Package updates All installed packages are up to date

Hello,
before the last webmin update I needed more collected data and

settings_sysinfo_real_time_stored_duration = 3600;
theme.config.save();

I ran the console command.

Now webmin has a new real-time monitoring time interval but after some time when I select 3 hours the setting reverts back to one hour.

How can I fix this issue.