I've faced a strange issue with session across subdomain only for google chrome.
I have two subdomain a.mydomain.com & b.mydomain.com.
if I open a.mydomain.com first on browser & then open b.mydomain.com & login from there then I'm not getting the session in a.mydomain.com. But if I login first from b.mydomain.co & then open a.mydomain.com I'm getting the session in a.mydomain.com.

I'm unable to solve this. Please help