height in 3 columns

Hey,

I know plugin still dont have more then year update, but still one of best for this feature.
On my TEST website you can see: https://evolvegame.funsite.cz/ at 4 Test 1a and 1 Test a1 thumbnails still have more height from the others in the columns.

Any idea how to fix it? Thumbnails has same h/w and still be regenerated. Thanks ??