Hey, this looks like a known issue with the diff review UI. Here’s what to check:
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Inline Diffs
Go to Cursor Settings > Agents > Inline Diffs. Try turning it off and back on. This fixed it for a few users: How to Enable Diff Review UI After Latest Update -
Mode per workspace
Make sure you’re using Agent mode in both projects. The mode can differ between workspaces, and that can affect auto-apply behavior. -
As @MidnightOak suggested, check if both workspaces use the same layout (classic vs new editor). In the new layout, the Undo/Keep buttons moved into the breadcrumbs and are easy to miss.
Let me know if any of this helps.