Comment 25 for bug 1506744

I can confirm this is happening in 15.10 as well. Some programs will show up in the dash after an install, others will not. Programs show up after a reboot or if the /usr/bin/unity-scope-loader is kill -9'd.

I also vote that this be given a higher priority as having to reboot or kill processes just to fix your workflow is a reason to abandon a distro all together in my opinion.