When the Bulette appears, the game usually puts you into turn-based mode. Do you have the option to end your current turn, which should move things along? (If that's it, I think it's to give any of your characters not knocked down the opportunity to position themselves before battle starts, which is good. But it confused me the first time I came across it and I do think the game should make it clearer what's happening. )
In terms of the general quality of patch 9, as is usual with software some bugs have been fixed but adding new features introduces new ones. I think it's ... shall we say, uncharitable ... to assume that Larian's QA team are not doing their job properly rather than that they have done the best job possible given the time and resources they've had available. Given it's early access, it feels reasonable for Larian to prioritise getting new features to players for comment and feedback as early as possible over making sure everything works perfectly. And because this is planned to be the last major patch, any additional resources spent on QA for early access would surely have a knock on impact on the release date or quality of the full release and, as long as Larian hotfix any showstopper bugs, I personally am perfectly okay with them focusing on achieving the August release date.