Quartus 15 compilation deterministically hangs for several seconds

Okay, Altera support doesn't seem to be an option for non-business users. Frack.

Anyway, I found a workaround, but a stupid one: I turn off my wifi (i.e. kill the Internet connection), and Quartus runs blazing fast. No more unnecessary stops. I get a simple design compiled in about a minute. I turn the wifi back on, compile again (even without re-starting Quartus in between), and it needs four minutes for the same job.

Is there at least a way to report bugs to Altera as a non-business user who cannot file a support ticket? I guess this is low-priority for them, but maybe I can help anyway...