If an enemy hero has a buff or debuff on them there is a timeindicator for that.
When the enemy hero is selected, enters fog of war, reenters line of sight, the duration has been reset on the timeindicator.
This is a bug and should be fixed.

If one reenters a game after a DC, the timeindicator for wards is gone.
This is a bug and should be fixed.

Please write if you excperiance the same issues, or if you do not excperiance them.