Summary:
When spectating a game the replay bar (game time, 'go live', back 10 seconds, and pause) blocks mouse over of backpack items.

Steps:
Spectate a live game (yet to try a replay)
Find a hero with an item in their backpack.
Mouse over the item in the backpack.

Result:
Replay toolbar appears blocking the item.

Expected:
Able to go beneath the replay bar and get a tooltip for the item in the backpack.


Comment:
The middle bar of the item slots is almost totally blocked by the replay bar, there's a small space where you can mouse over them.