When using config.php, config values get locked which shouldn't get locked.

[Nielex]

For example if config is dumped to config.php. It writes:

• dpdshipping/accesstoken
• dpdshipping/accesstoken_depot
• dpdshipping/accesstoken_created

To this file. When connecting and getting a new access_token from DPD this access_token is written to the database in core_config_data with path dpdshipping/accesstoken. But when loading this with

$this->scopeConfig->getValue(self::DPD_ACCESSTOKEN);

The value from config.php is returned, which is different and causes errors.