User profile does not clear after switching to a different user

leads to mixed profiles

assigned to @tae

@lambadalambda It's hard to reproduce this. Can you kindly add steps to reproduce?

mentioned in issue #602 (closed)

mentioned in merge request !865 (merged)

Finally, I was able to reproduce this issue.

steps to reproduce;

1. open the user profile page
2. go to the public timeline or any other page before user timeline is loaded
3. wait a few secs and then go to another user's profile page

fixed at !865 (merged)

closed via merge request !865 (merged)

mentioned in commit 60b413d0