COOKIES WORKING ON AND OFF

When I test login my lure, it captures all cookies. When I test first it works and I clear cookies and tried another login for same account. Captured cookies looks smaller than first one and when I try injecting cookies, it doesn’t work. I go back to inject previous first cookies too that doesn’t work.

After few hours then first cookies works again but second doesn’t work even though I completed the whole login process.

Please what could be causing this?

which brower u using to inject cookies ? also wjhich plugin ?