Why are logos not showing on mobile wordpress?

Question

css

There was such a problem.
I made up a gallery of partner logos, with a "Show more...." button. I made it first on css grid, but logos were not displayed almost anywhere. Then I made it on flex. Now only a few logos are not displayed on mobile, what could be the problem?

https://jsfiddle.net/xp9rz8a0/6/

Inserted into WordPress like this:



Updated

Please see why logos are not displayed here on ios https://rentpro.com.ua/