Magento 2.3 MGS front-end block not working correctly on live website

I am facing a strange issue in Magento 2.3.

I am using Unero template with MGS front-end builder which contains a block to show products by attribute.

It was working fine until recently I noticed it ignores the attribute I define and shows only grouped products regardless of the selected attribute.

The strange part is that the same block is working correctly on local development machine with an exact copy of the live website and DB.

Of course I’ve already tried clearing the cache multiple times and tried even disabling cache but it didn’t help.

What am I missing here?