Incorrect icon on wireless connection

[Sancho]

On my new installation of Xenial, the Network Manager behaves strangely.

When I booted the first time with no known networks, I received a notification about available networks.
I checked the list of available, created one configuration and connected.
So far, OK.
However, after restart, when the notebook boots and there is already a known network, it connects, but instead of wireless signal strength the nm applet displays icon for wired network.
Connection information shows it is a wifi network (Interface: 802.11 WiFi (wlp63s0)), but reports very weird speed (6 Mb/s) - the real speed is ~200 Mb/s. Also, the list of available networks is empty.
Opening nmtui and listing connections in "Activate a connection" I can see other networks.
But the applet shows no wireless networks and sometimes does not even show the disconnect item in wireless (sometimes it does). I did not recognize a pattern when it shows the menu item and when it does not.
When I run `sudo service network-manager restart`, everything fixes to the proper state - I seen wlan icon, available networks, only connection information keeps telling me I am connected with 6Mb/s.
The package version is 1.2.6-0ubuntu0.16.04.1.
The wireless adapter is Qualcomm Atheros QCA6174 802.11ac, using module ath10k_pci.