Duplicate of T168858?

@Aklapper I'll suggest the suggestions there (reset password, create new account) and will report back. Not sure if it is the same thing either, but worth a try.

I saw few other reports too, one here:
https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:Questions_techniques/semaine_28_2017, few days ago, first section, in French. User lost his connection when he refreshes or goes to another page. He tries with different browsers.

In T170768#3442039, @Aklapper wrote:

Duplicate of T168858?

For me, yes.

@Aklapper it is confirmed that resetting the password did the trick. I assume it is indeed a duplicate, although it is not confirmed the cause is the same. I'll mark it as such.