I think what’s happening here is that v0 has a custom version of Popover to make it work properly in the preview iframe, and that’s what you get when your project doesn’t specify one, but then after you sync back it gets overridden with whichever one was in your project
If that’s the case you may be able to unblock yourself by deleting the broken shadcn components in v0, which should then let your project use the fallback ones
I’ve passed this along to the v0 team to debug