using 12.4.0 PRO (J4):
instead of loading="lazy" (attribute to the img-tag)
the plugin generates loading="1" within the html of the page ...

( docs4.regularlabs.com/modals/getting-sta...media-media-settings )

still does not work with "12.4.1-dev2718879 PRO" ... (did you test it ?)
- when switching off the feature in the backend it is applied loading="0" to the img tag
- when switching on the feature in the backend it is applied loading="1" to the img tag

both attributes that are non existent within the html standard

in \plg_system_modals\src\Image.php
you call:and in \pkg_regularlabs\packages\lib_regularlabs\src\Image.php
the function is definded as:IMHO if you pass only true/false or 1/0 to this function,
this would explain this faulty behaviour

yes,
it works with v12.4.1-dev2719369 pro