Chrome Version: Canary 57.0.2942.0
OS: Android (Nexus 6P)

What steps will reproduce the problem?
(1) Open New Tab Page;
(2) Download multiple article suggestions using "Download link" from the context menu.
(3) If the first suggestion takes long time (usually CNN does this), quickly open notification bar. Otherwise repeat step (2).

What is the expected result?
Buttons cancel / pause on a notification which is currently being downloaded (i.e. blocking all others from being downloaded);

What happens instead?
Buttons cancel / pause on the first notification in the list (i.e. the one pending). Thus, in order to cancel the page you downloaded first, you must cancel all downloads above it.
Note that tapping on the currently downloading notification does nothing.