Ocurre desde hace 1 o 2 días con varios navegadores, y solo cuando abro los foros (este, el mío y otros foros de Discourse), pero no cuando navego por los distintos temas.
¿Es un cambio voluntario?
I can repro on Meta and Try. I don’t believe this is intentionally, but it’s also incredibly minor.
Certainly, in fact I opened this topic only for curiosity, believing that it was a desired change and wondering if I got lost some discussion about it.
If there was discussion I missed it too 
.
The closest thing to a discussion about this that might be related that I can remember seeing was about the importance of having a good title for SEO purposes.
“Page 1” is an awful title for SEO purposes.
It makes sense - text-only viewers / JS disabled users / crawlers get a paginated view of the forum rendered server side so that it can still be used. ‘Page 1 - Discourse Meta’
Then when the app loads the page title is replaced with just e.g. ‘Discourse Meta’.
Maybe you just now noticed it and it’s like the Fedex arrow - you can’t unsee it? 
EDIT: it does appear to be a difference that has come up recently, but I’m not sure why - haven’t dug into it.
Can you repro this @techapj on a connection from India with more delay? I wonder where that title text would be coming from.
It’s coming from the HTML title provided in the initial page load.
Hmm if it is the non-crawler HTML we should fix that @techapj. I can’t easily view source on my iPad to verify.
I can repro this here on Meta, added on my list to fix. 
I just fixed this, the flashing was bugging me.