Display of (google-)Map an Sort order

[Karl1]

Hello, I have noticed some strange behaviour in the gallery. Everything is normal in my test system: the map with the markers is on the left and the list is on the right, sorted in descending chronological order.
In the PROD system, the map has disappeared and the categories are sorted in ascending order.
I have Joomla 5.4.2 and Phoca Gallery 6.0.1 in both systems.
Please see the images.

How can I restore the map (and the sort order) ?
Thank you in advance.
https://imgur.com/a/CzwvK82