All, this problem went away for me after I did, 1)
dconf reset -f /org/compiz/
setsid unity
And mostly 2)
I used to run a laptop and a monitor (dual monitor) with only 1 launcher, but since I reset Unity I have kept "Launcher placement" to "All displays" - Ie. I did not touch the defaults after reset.
I did this October 16th and haven't seen the problem since.
All, this problem went away for me after I did, 1)
dconf reset -f /org/compiz/
setsid unity
And mostly 2)
I used to run a laptop and a monitor (dual monitor) with only 1 launcher, but since I reset Unity I have kept "Launcher placement" to "All displays" - Ie. I did not touch the defaults after reset.
I did this October 16th and haven't seen the problem since.
Hope this helps.