How to reproduce it :
I renamed the "abstract" view and the main view of a content. Abstract = carousel and main = grid. You can use the XML file in attachment into web\WEB-INF\param\content-types_override : org.ametys.plugins.myfavorites.Content.myfavorites.xml
I restart and select the content :
- on the content tab, Content view button, the two views : carousel and grid appear well
- on the page tab, View setting, the Carousel view appears well but not the Grid view. It display "main" instead of "Grid".