For me, I saw this in iTunes 10.7 all the time. If I reset safari, then when I opened iTunes, it asked me for password. Since updating to 11.0.2, it doesn't ask me for password upon open, just when I want to view wishlist (which oddly I'm still logged into iTunes). So at least it doesn't ask upon open of iTunes anymore (after a Safari reset).
I'm guessing "fixed soon" means within a decade or two? It's been two years, and this bug still plagues my PC. I've managed to stop it briefly, but it always crops up again. And no, Safari has nothing to do with it. I'm not stupid enough to use Safari. I just fixed it again by clearing iTunes cache, then restarting. No need to reboot.