Customer login only working in private browsing

[web_master12]

When a customer tries to login to his account, it redirects right back to the login screen. The text on top changes to way "Welcome, ", but the customer can't actually see anything in his account.

Any reason this could be happening? I've cleared and restarted all caches quite a few times, but always with the same result.

[gaurav_harsh1]

Hello @web_master12 

Apart from Magento cache, browser also cache data, can you delete your browser data for once and check !

hope it will work after that.

[web_master12]

Tried all of that many times. No luck. If there's a 3rd party extension causing this, is there a good way to debug this, or should I just start disabling plugins?