Display problem with a collection list

Hello, I am building a site but I have a display problem with a list collection.

The different cards are not all displayed in the right place. Normally they are all next to each other but sometimes some have a much larger space between.

I can’t find the problem.

Here are screenshots.

Do you know what I could do?
Thank you in advance for your help and your messages.

Here is my site Read-Only: LINK