Wrong status with Mobil App

After installing Blizzard Battle.net App (German client, EU) my status is permanently set to “AFK mobile” for some of my friends from my FL, even though I do neither have the app active on my phone nor the launcher on my computer.

As soon as I log in on my computer into the launcher or on the mobile, status is correctly set to online, but when I log out, I’m not shown as “off” but still as “AFK mobile”.

Even after uninstalling the app the problem remains.