I did encounter Sofia's soft lock before. I met her at the mall, and she invited me to the gas station. I said I'd go later but forgot all about it right after. By the time I remembered, I couldn't trigger the gas station quest anymore—but that should have been in version 1.6. As for Emma, I've always been able to trigger her quests normally. You need to explain why you think there's an issue with triggering hers.