TYPO3 Core

Referencing TypoScript through the referencing operator (=<) is not working as expected, when you reference plugin settings to backend settings to have the same set of data for the backend module.

Example:

plugin.tx_ext.settings =< module.tx_ext.settings

Does not resolve the current settings, but wrong ones, when fetched via

$configurationManager->getConfiguration(ConfigurationManagerInterface::CONFIGURATION_TYPE_FULL_TYPOSCRIPT);

IMHO this is quite a blocker for extension development when functionality in FE plugins and BE modules is expected to be the same because it is based on settings. Thus, assigning "must have".