Hello,
yes, it right as you describe it. Yes, I know that when I refresh it manualy, the new image is displayed in the list. Unfortunately I use the ACF image field in the frontend, so this solution is useless.
I spent some time trying to solve it yesterday and I think that I solved it. The problem is in the mla-media-modal-scripts rows 241-247. In the WP file media-models.min.js there is the allowed array defined on the row: 656. If I add the ‘mla_source’, ‘mla_search_value’, ‘mla_search_fields’, ‘mla_search_connector’ to the array, it works fine (not 100% tested yet). Unfortunately I wasn’t able to solve it without changing the WP file directly.