Gallery block displays vertically

Hi there I have the same problem, as resolve in this topic: https://www.ads-software.com/support/topic/gallery-blocks-show-vertical/

After update to 6.1.1 some galleries got displayed vertically … but not all. Here are 2 pages where the display is now vertical :?https://mezlef.net/qui-suis-je/?and also?https://mezlef.net/contact/

Interestingly, the gallery on this page displays correctly: https://mezlef.net/se-rencontrer/ and this page https://mezlef.net/invitation-mode-d-emploi/ displays correctly when I don’t request the gallery to be centered…

My theme is Customify. I deactivated all plugins but the problem remains. The gallery displays correctly with theme 2023 activated.

I tried to change the css but since I agree that the behaviour on phones is not ideal, I’d rather check if there is another option… This website is a test environment, so I have removed the css (.is-layout-flex {display: flex;})to enable you to acknowledge the issue and let me know if there is another option than adding .is-layout-flex {display: flex;} in the css.

Thks in advance for following up on this issue

The page I need help with: [log in to see the link]