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

**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