Open source DNMS Noise sensor- ESP8266: config restores to its default measurement interval

[Apekoppie]

Hi,
After several changes to the CONFIG my DNMS Noise Sensor ( ID: 6349154 (f4cfa260e162 and to be found here : https://devices.sensor.community/sensors/48666/data) the configuration parameter drops back to its initial value of 145 sec. This is too long to analyze noise peaks (30 sec is a more suitable interval). Even after deleting the entire config in my sensor, and next setting the interval to 30 sec , that "worked" until the next boot after which the default interval of 145 sec is set again.

How to store the interval of 30 sec. chosen by myself permanently, is somehow very unclear:

As I didn't find an admin at 'sensor.community' I hope that posting here, helps. Thank you.