All secure sites broken on chrome iOS app version 21

Hello,

We have a proxy in our company. With latest chrome, all https access are broken with message "Server certificate is not trusted".

Safari works fine. Company proxy does SSL Interception and its root certificate is installed in Cert Store.

Reading online it seems that chrome would do Certificate pinning for google services however not able to browser non google sites as well.

Any pointers?

Best,

-Z