Steps to reproduce:

1. Go to "User settings" -> "Profile" 
2. Click on "Auto-logout" checkbox and set time for 100s
3. Click "Update"
4. Go to "User settings" -> "Profile" 
5. Click "Change password"
6. Enter valid data in password fields
7. Click "Update"
8. Log in with new password
9. Go to "User settings" -> "Profile" 

Result:
Value for Auto-logout is set to default "15m"

Expected:
Value for Auto-logout should be as set before "100s"