It's enough to tell you that, if it does happen, it must be quite rare and not a widespread systemic issue. It's also worth noting that Anthropic and co are so confident that it's a non-issue that they offer full copyright indemnification to their commercial users.
> It's enough to tell you that, if it does happen, it must be quite rare and not a systematic issue.
alternative perspective: it's just taking time for the lawyers to figure out what they can sue them for.