Quark bricklayer showing wrong number of columns

I am deving the site on my local machine https://grav1.test/ and uploading to my host over rsync.

Locally my blog shows the nice default 3 column bricklayer (normal).

On the host the blog degrades to a 2 column bricklayer as if the screen size was smaller. However I am viewing them both on the same browser. Tried in FF and Chrome, same results.

This was not the case when I first started the blog, and I have made no changes that would affect the bricklayer... this must be a result of an update.

I find the two columns ugly given the screen size is large enough to accommodate three columns. Does anyone know any way to fix this?
–thanks in advance 🙂

This topic is similar to another posted /forum/themes-styling/3-column-content-on-blog-page-with-quark-theme-t8650
However everything was working fine six or seven weeks ago and I haven't changed anything. I have attempted the fix mentioned by placing the css snippet in my theme's custom.css but it had no effect.

This is hard to analyze, without having seen the site.
Just my 2 cents:
Have you cleared the cache on both sites as well as your browser cache?
Is there any error in your browser's devtools console ?

@joel-marks, I do not recall the blog page in theme Quark ever had 3 columns...

Also, the post from Aug '18 you are referring to, shows an image with 2 columns and OP wanted 3 columns instead...

So I'm not sure which column count is 'wrong'.

Anyway, I have no idea why two sites show different column counts, but setting the media query in 'themes/mytheme/css/custom.css' still works:

@media screen and (min-width: 980px) {
    .bricklayer-column-sizer {
        width: 33.3%;
    }
}

Sorry: My description was faulty. To clarify...
On my laptop it looks like this (how it should look):

But on the internet it looks like this:

The size of the viewing window is the same.
I cleared the cache with no effect.
I also deleted the entire site from the server, checked that it was gone by attempting to view it in browser, then uploaded the site again and viewed it using a private window to avoid any potential use of the cache.

Inspector shows some errors in the css but they don't seem related as they appear on the local site that is rendering properly. I am not a developer so I don't really know.

@joel-marks, Ok, so the bricklayer shows blog items in 2 columns on laptop and in 1 column on the server. Right?

What could be happening is that a blog item contains an element that forces the entire column to be wider that 50%. In that case, bricklayer cannot fit 2 columns next to each other and can only show 1 column.

But that would then apply to both sites if all blog items are the same... Are they?

Please share a link to your site so we can have a look at it in its entirety.