Listen to proxy setting changes

Hi all,
I have a plugin that reads the proxy settings configured under Settings | Appearance & Behavior | System Settings | HTTP Proxy, and uses it for external processes that don’t run from the platform. I use the (somewhat) new com.intellij.util.net.ProxySettings that came with 242.
I need to set up a listener to know when this configuration is changed, and adjust my external process accordingly. I couldn’t find any listener for it, or generally for configuration changes.
Any help here would be greatly appreciated!

I’m not sure, but maybe this listener could help you: AdvancedSettingsChangeListener

Unfortunately, not only does it not trigger for HTTP proxy changes, it doesn’t even trigger for advanced settings changes. In IntelliJ Platform Explorer I also don’t see any plugin using it.