The following issue was raised by an Adobe partner...
We are facing an strange problem post AEM upgrade to 6.3.
We have OSGI service configurations, that has a default value in the code (usual implementation). The service config property values are of course modified in the environment from OSGI console (http://<HOST>:4503/system/console/config). This was working in AEM 6.1. After the upgrade to AEM 6.3, we have noticed sometime in some of the environments, the modified values are not getting picked up and instead the default value from the code is getting picked up. While investigating, I don’t see anything unusual. Like the modified configurations are present under /apps/system/config. Also, I have noticed, if I rename the file.config (just an example) to file1.config and then rename back to file.config, the modified configurations are getting picked up.
Could you please help us on this problem to fix it permanently?