It happens from 1 or 2 days with various browsers, and only when I open the forums (this, my, and other discourse forums) but not when I navigate through the various topics.
Is a voluntary change?
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I can repro on Meta and Try. I don’t believe this is intentionally, but it’s also incredibly minor.
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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.
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If there was discussion I missed it too 
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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.
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“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.
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Can you repro this @techapj on a connection from India with more delay? I wonder where that title text would be coming from.
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It’s coming from the HTML title provided in the initial page load.
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Hmm if it is the non-crawler HTML we should fix that @techapj. I can’t easily view source on my iPad to verify.
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I can repro this here on Meta, added on my list to fix. 
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I just fixed this, the flashing was bugging me.
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