only CRM ribbon is rendered.

The CRM page is not rendered completed in IE (v11), and the user can only see the blue ribbon. Did anyone run into this issue?

It happens very often if I started IE with "run as a different user". However, some user just reported that this happened to him even if he started IE directly with his network account.

The issue is gone if logoff-then-login or restart the computer.

Any suggestions on the cause of this issue, and is there an easy way to resolve this without having to logoff or reboot?

Thanks in advance!

Hao