Network icon shows question mark after connected to wifi, not wifi radio strength icon

[Jesse]

BEHAVIOR
After I successfully connect to a wifi network, the network icon in the system tray (at the top-right) shows a question mark over the radio strength symbol (even though the Internet connect is working fine). After about 3-5 minutes, it disappears and the radio symbol shows the signal strength.

EXPECTED BEHAVIOR
For the question mark to not be showing if the connection is successful and there is valid Internet access, I suppose.

BUG DISCOVERED USING
Ubuntu 17.10
GNOME 3.26.1
Xorg 1.19.5
Nvidia 384.90 proprietary driver
Linux kernel 4.13.0-16-generic
Panda USB wireless N wifi adapater, connected to a 5.0ghz linksys wireless router (E2500)

[Jesse (jessedubord)]

Screenshot is available upon request.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1722256, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Caleb Huggins (axium1998)]

This is happening even while using ethernet in a virtualized environment

[ed20900 (ed20900)]

I am on Ubuntu 18.04 LTS.

This happens to me from time to time. If I reset the router the question mark disappears.
Check that the DHCP table has no conflicts. Or that your router is not hung.