Ignoring the rest, but this is working as designed. Liches and anyone else who isolates themselves should feel like the world is getting stranger. Hermits not recognizing society when they return to it is an old pattern. Isolation brings stagnation and distortion. That's the way of things.
Fundamentally, becoming a lich in Dreams of Hope is a trap. It's self defeating and done out of fear of dying, for the most part. And while you may not die physically, your certainly die as a soul. Same for most other forms of bodily immortality. And even ascension has its tradeoffs. All that lives must die. That's the First Law.