I use Chrome on a personal PC on which I am the only user. I am logged into several websites, all of them with the "stay logged in" tickbox checked. Even so, very often when I go back to some of these websites, I find I am logged out and need to log back in every time. This happens even if the previous visit was recent; I suspect the critical action is the restarting of the browser rather than time elapsed.
Strangely, this problem happens only with certain websites (among them, booking.com, leo.org, oebb.at) but not with others (such as the StackExchange sites, or the Google sites such as Gmail/YouTube)
I used to think this is a problem with those former websites, but I realise it probably has to do with Chrome itself. What can I do to diagnose it? The only way I'd know how to do this is to disable each extension (add-on) at a time to see if any one of them is at fault, but that would take quite a while.
I am on Windows 10 and let Chrome update itself (currently at v77.0.3865.90).
EDIT Sep 2021: Meanwhile Chrome is at 92.0.4515.159, but this problem still persists. The same websites (listed above; but also others I could list) constantly log me out after a mere few hours since I last logged in, while other websites (the remaining 50% of them or so) keep me logged in, as per the checked tickbox in the login form.
I do not at all think this is intended behavior by the website owner, as @LPChip and @WilliamDiaz suggest below, because it would be completely impractical for any website to be so configured, and bound to only annoy its users if it did.
I've restarted Chrome (many times) and cleared cookies. Has anyone else run into this problem and suggest what else can I try (short of trying to disable Chrome's addons one by one)?
EDIT #2: I did some testing in Firefox, and it mightbe that the same happens there, which would give support to the hypothesis of this being a website-end issue (a 'feature not a bug', though I'd claim it's a shitty feature, since the logout happens after a few hours only)