Solved
We logged in as an admin user in AEM 6.2 author instance and tried to edit or delete the dialog in all the components. But immediately the instance is getting logout and login automatically and also not updating in page.
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I see you have also raised a daycare ticket for this issue. This issue was happening because of custom component filters and com.adobe.granite.csrf.impl.CSRFFilter not being set for few browsers.
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