Steps to reproduce the problem:
Im having a very peculiar issue with regard to Chrome & all Google apps on my iPhone.

1. I open the app
2. I sign in via settings
3. It remains signed in
4. I swipe up and close the app
5. The moment i close the app (swipe up & close) and relaunch it then it loses the previous sign in details and again tells me to enter username password. Everytime. It doesnt seem to save the details.

I have all apps including chrome to the latest version yet facing this issue

I had noticed previously when it used to work I used to open the app it always used to suggest my gmail id's but now everytime just "add account" is mentioned.

Been facing this issue only for the past 1-2 months.

Just to reiterate - On my phone (iPhone 6, iOS 8.1) just the Google related apps are affected - Chrome, Gmail, Drive etc. There is no such sign in issue existent with any of the other apps like facebook, twitter, snapchat, etc etc. 

I hope you will understand how frustrating it is to sign in everytime.

Can it some sort of virus? Extremely worried.

I have tried restarting the phone, rebooting, deleting the app and reinstalling it, clearing cookies, turning on the autofill etc but I just dont know how to resolve this repeated sign in process.

The google apps im using are Chrome, Gmail, calendar, youtube, maps, drive, keep, etc.

Phone info - iPhone 6, ios 8.1.

Please help me.

What is the expected behavior?
It should remain signed in

What went wrong?
It signs out automatically or loses the sign in after I close the app.

Did this work before? Yes 

Chrome version: 47.0.2526.107  Channel: n/a
OS Version: iOS 8.1
Flash Version: Shockwave Flash 21.0 r0