I have an issue on sorting results in browse pages.
I am using latest AtoM 2.6.4, MariaDB 10.6, running ElasticSearch 5.6, on Ubuntu 20 LTS (same issue is also happening on CentOS 7).
Database is created using charset utf8mb4 and collation is utf8mb4_unicode_ci.
The point is that it was working as expected, but a couple of days ago I decided to recreated the ElasticSearch index, and the problem started.
I have cleared the symfony cache, stop the PHP, and also repopulated ElasticSearch again, but no luck :(
Is there any open issue related to this feature? I have check the forum and issue tracker, but I didn't find anything related.