Issue1: When adding items to cart, site shows empty cart when checking out.
Issue2: Customers are logged out of the site too.
This usually happens to repeat visitors.
What we've tried so far:
1. Delete Browser Cookies -
Result: this works sometimes but explaining this to customers on a daily basis hurts the business not to mention it's a bit difficult for them to navigate with the browser's settings.
2. Changed Magento 1 Cookie Domain to: .(dot)<ourdomain>.com
Result: Couldn't login of the Admin and Front-end
3. Checked hosting's file quota limit
Result: Far from being full.
4. Changed Magento 1 Cookie from 3600 to 86400
Result: Didn't work.
5. Contacted my hosting support
Result: Couldn't help
6. Planning to change the values from Software > PHP.INI (please check image attached for default values)
No extensions or codes where changed this year.
Thanks for the help.