Changes made not showing up on website

My site theoctant.org is having issues with updating the content on the page. Certain post pages, for example – https://theoctant.org/edition/issue/features/cake-romance-and-the-ace-of-hearts-a-conversation-with-the-asexual-community-in-yale-nus/ – are currently displaying a mobile template page (on a desktop browser, no less) that I have tried to discard, even when I have changed it back to “No mobile theme”. The strange thing is that after I log into my WordPress account and make the changes, everything shows up perfectly when I am using the same browser from which I changed it (even when logged out). However the moment I use a different browser, the whole page is different.

To make this clear, this is what I see when accessing outside the original browser page:
http://prnt.sc/10keucm

This is what I want it to look like, having edited it as such using the composer:
http://prnt.sc/10kevk3

On mobile, this is happening as well.
http://prnt.sc/10kewvd

Yet on certain pages, this is completely not an issue. It seems to be completely random, which pages are ok and which are not.
http://prnt.sc/10kf0bs

This is really frustrating me. Aside from this specific issue, many times, it seems like changes take a significant amount of time to be reflected on the page (more than a day) after being changed in composer. If this is consistently going to be the case, I am deeply disappointed with the amount of money I have spent on TagDiv. I have already disabled all other plugins and updated to the latest version of Tagdiv. What is the problem here?

This is happening to me too: http://www.tenews.ro
On mobile, all the new articles appear, but on Desktop they don’t. Any tips?

Hello,

I’ve installed and configured it according to the link. I still find that changes to the front end are not being updated immediately!

Thanks!