Opening Hipchat for iOS clears notification center messages

Summary

After receiving an iOS push notification, opening the Hipchat for iOS client clears unread badges and the iOS Notification Center notifications without a user reading the message they were notified for or opening the associated Hipchat Room(s).

Environment

• Fresh Hipchat Server install, v2.2.6
• Hipchat for iOS v3.16.3
• iOS v11.1.2
• Stable WiFi connection
• Web client in FireFox v57.0

Steps to Reproduce

1. iOS User - logging in:
   1. Log in to iOS app
   2. Set Hipchat to 'lobby' screen (ie: not focused in any room or 1-1)
   3. Background Hipchat app
   4. Lock iOS
2. Web user - sending push:
   1. Log in to web client
   2. Wait for iOS User to switch to 'Mobile' status
   3. @-mention iOS User in 'Default' room - push notification is sent to iOS User
3. iOS User - checking phone:
   1. Device vibrates from push
   2. Wake device - see push notification on lock screen
   3. Unlock device
   4. Hipchat app has iOS message badge
   5. Verify notification exists in iOS Notification Center (swipe down from top of home screen)
   6. Open Hipchat app

Expected Results

1. Unread badge is present for room in which user was mentioned
2. Background app
3. Hipchat app iOS message badge is not cleared
4. Notification is still present in iOS Notification Center

Actual Results

1. No unread badge in Hipchat app for room in which user was mentioned
2. Background app
3. Hipchat app iOS message badge is cleared
4. Notification is gone from iOS Notification Center

Workaround

None at this time.