Problems with portfolio grid display

Hi.

I really hope you could help me. I have been very pleased with Olevia theme for my graphic design portfolio page but since I updated it the last time it looks weird.

It should be three images displayed in every road but know there are som rows with only one or two images and it is random. I have checked the image sizes and also tried to disable some post to see if the actual posts are the problem but the issues remains in the other posts so it doesnt matter.

I really hope it is an easy fix so I can be proud of my portfolio again and doesnt need to change the theme. I would be very grateful for your help and hope it will work as soon as possible.

My portfolio page.

I really hope I get some answers quickly. Thank you.