I had a brief look around and these accusations seem to originally come up in a leaked script for an episode of the Duexmoi gossip podcast. Some of the responses to the accusations can be found in this Vulture article, but there’s not a lot in it. As they state, “everybody involved in The Witcher is […] playing nice on the record.” So… *shrug*. Very disappointing if true, but no one’s confirming anything…