SignIn Verification is no where to be found if i had some external activity opened

[Hirobreak]

Describe the bug
When I receive the notification that there is a sign-in verification and I enter the app while there was an attachment opened from the app when it was closed, the sign-in verification popup gets lost even if i go all the way back to mailbox

To Reproduce
Steps to reproduce the behavior:

1. Open an email with an image attachment
2. Open the attachment
3. Close the app
4. Sign-in with another device
5. Open Criptext App from the existing device
6. Close the attachment viewer
7. Look for the pop up of sign-in verification. It's no where to be found

Expected behavior
If i close the attachment viewer, i should be able to see the pop up again
Screenshots (Optional)

Device and System information (please complete the following information):

• Device: IPhoneX
• OS Version: 11.2
• App Version: 1.0.11