I have a problem with a Magento2 installation.

If I am logged in as a client on a browser, with another browser (client not logged in). If I do the same actions on both browsers, the second browser (on which I was not connected) takes the first session ....

I Try this solution : Suddenly started using another logged in user's session - Magento 2

But It doesn't work

SID is disabled

I have the problem that the cache is enabled or disabled

And I still have the problem if session are stored on files or on db

After some modifications, it seems that the session is no longer "stolen". By cons there is always a problem in the display. For example with my logged session I go to https://example.com/customer/account/ as well as with my unlogged session at the same time: on the unlogged session I see the information of the other session.

I'm thinking of a cache problem, but by completely disabling the cache :

php bin/magento cache:disable

the problem persists

someone would have an idea of the origin of the problem?

It seem's that is a server issue, on my chrome console I've got this message :

Error parsing header X-XSS-Protection: 1; mode=block, 1; mode=block: expected semicolon at character position 13. The default protections will be applied.
  • You have issue in login Magento admin at a time same user with multiple browser Right ? – Kirti Nariya Nov 22 '18 at 15:58
  • @KirtiNariya no the issue takes place on the frontend side. I am connected as a customer on a browser and on the other not – Gildas Ross Nov 22 '18 at 16:59
  • Which Magento version are you using ? – Kirti Nariya Nov 22 '18 at 17:05
  • it's Magento 2.2.5 – Gildas Ross Nov 22 '18 at 17:27

For fix Customer login issue in multiple browser change "Share Customer Accounts" to "Global"

Follow below path in admin:

Admin >> Stores >> Configuration >> CUSTOMERS >> Customer Configuration >> Account Sharing Options >> Share Customer Accounts to "Global"

Let me know if any issue.

Hope it help!

  • it doesn't work, the issue is still here – Gildas Ross Nov 22 '18 at 17:25
  • Try to flush cache run this command: php bin/magento cache:flush – Kirti Nariya Nov 22 '18 at 17:27
  • I already emptied the cache. even with the cache off (php bin/magento cache:disable) the issue is persistent – Gildas Ross Nov 22 '18 at 17:32
  • Okay. Then you can debug you issue to disable all third party and custom created module. And then check. – Kirti Nariya Nov 22 '18 at 17:34
  • Try to disable all external module, set the default theme.... nothing the issue is still here... I re-install a clean version of Magento Without external code I got the same issue... – Gildas Ross Nov 22 '18 at 22:26

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