Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Suggestions and Feedback Bug?" Vendors not restocking or changing items

In 6-plus hours , including 5 level-ups in Ft Joy Mona always had the exact same Necro books with zero change. In 4-plus subsequent hours on driftwood map including 2 level-ups, both the Driftwood necro manager and the witch NW of Driftwood also have zero change in books.

This is almost a game breaker as I was searching for a necro book of Rain of Blood much needed for some quests. (BTW -- not yet discovered recipe for rain of blood SCROLL so I could craft the book.)

Question -- is this a bug, or a change to DOSEE where vendors seemed to restock every hour (real time) or also and after lever-ups?"