https://cs.chromium.org/chromium/src/chrome/android/java/src/org/chromium/chrome/browser/download/items/OfflineContentAggregatorNotificationBridgeUi.java?rcl=9f11faaa13c0238b5d29cfe312149987119bca92&l=230 is causing this, which went in as part of https://chromium-review.googlesource.com/c/chromium/src/+/1011227.

Consider removing item.isTransient from that check.

Bumping to P1 as this is blocking development on our end.
is_transient in the OfflineItem struct (https://cs.chromium.org/chromium/src/components/offline_items_collection/core/offline_item.h?rcl=4a4f739bcda82268926827d28eb058e2f716537e&l=106) is defined as:
  // Whether or not this item is transient.  Transient items won't show up in
  // persistent UI spaces and will only show up as notifications.

I'm proposing a CL shortly.

Updating owner & status because it sounds like you're working on this Mugdha, please change back if incorrect.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ef7b418e2945c4f2cc146b14d12f9f90bbc49887

commit ef7b418e2945c4f2cc146b14d12f9f90bbc49887
Author: Shakti Sahu <shaktisahu@chromium.org>
Date: Fri May 11 00:41:35 2018

Download : Removed isTransient check from background fetch notifications

Transient downloads are meant not to show up in download home. However
notifications must be shown during the download. This was broken
recently due to a change which affected background fetch notifications
to get lost. Restoring this behavior.

Bug:  841344 
Change-Id: I034b9761b0bd33275e23a298691b49e0db7f6d3f
Reviewed-on: https://chromium-review.googlesource.com/1052891
Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557740}
[modify] https://crrev.com/ef7b418e2945c4f2cc146b14d12f9f90bbc49887/chrome/android/java/src/org/chromium/chrome/browser/download/items/OfflineContentAggregatorNotificationBridgeUi.java