I just ran into this glitch! Started to marathon the companion quests, just completed Felix's and wanted to move onto Parvati's next (I had already gotten her questline to "Don't Bite The Sun"). Initially was super confused when I didn't see it under the Companion Quest section before I finally found it under Botched. This really sucks, I was interested in seeing her story through and and it just feels wrong staring at this "Parvati was killed." description when she's my go-to party member for combat.
