Their is a current issue with active key after using it.

You get logged out after a refresh of the page in these cases:

After submitting the active key for promotion

On reload or going to a different page it logs me out.

After submitting the active key in internal market

On reload or going to a different page it logs me out.

Already submitted the bug here:

https://github.com/steemit/condenser/issues/1361