This is what I've done in the past to fix the Misty bug; essentially collect all of the tarot cards and then her dialogue to complete the Fool on the Hill quest will trigger. After you complete the quest, Misty will return to her normal, seated position and enable her regular dialogue.Ok, I am reporting back that I just collected the base game Tarot cards in Night City and it indeed fixed Misty for me. I could start a dialogue with her and when I returned she went back to her table and was interactable again.
No PL cards, or not even the ones that are locked behind endgame stuff (like the Tarot in the Smasher boss room) were needed.
I hadn't tested to see if this still worked in 2.0, but it's good to hear that it does (ideally it would have been best if the bug didn't happen).
On an side-topic, speaking to Misty in her shop after the Heist still prevents you from leaving messages on Jackie's voice mail. Specifically, asking her to read your tarot cards (perhaps even the investigative options ruins the ability to leave Jackie VMs) seems to disable the ability to leave Jackie voice mails, although speaking to Misty during Heroes or about the Fool on the Hill quest doesn't affect the voice mails. Since I'm a completionist, I've been avoiding speaking to Misty until towards the end, just so that I can leave the final voice mail to Jackie.