Strange behaviour on ipad?

Good afternoon all. I would really appreciate a little help or advice please.

I have this grid set up on this website and it seems to work fine on the computer and phone (see video) but on my ipad in landscape and horizontal mode it is wrong (see screen shot).

I have tested on browser stack and it also looks wrong on there… (I can only check on a 2nd generation ipad)

In theory the ipad SHOULD look like a two column grid, but in reality it displays as a one column grid and the white lines are showing wrong.

Here is my site Read-Only:

Here is a link to my Loom video showing the issue: