Bounding boxes not working properly

Hi,

I recently made a 3x3 model in blockbench https://imgur.com/a/xGgUnEZ.
Everything works fine, except the bounding boxes. No matter what I try, the corners just aren't solid (you can pass through these blocks https://imgur.com/a/PzeTp5Q)

The bounding boxes look like this https://imgur.com/a/Bmok8SY . I generated them from the model, and the issue isn't there, the values are same in the JSON file. I even checked the java code, but everything is looking fine.

Hope someone can help

PS: I'm using MCreator 2024.4.52410 and can't update to 2025.1 because of some plugins.