AIKIDO-2026-366681

TL;DR

The @portabletext/editor package can enter unbounded recursion that overflows the JavaScript call stack and leaves the editor blank until reload. The preventOverlappingAnnotations core behavior raises an annotation.remove followed by the original annotation.add whenever its guard reports the annotation active, but the guard and the remove operation can resolve the effective selection differently, so the remove strips nothing while the guard keeps reporting active and the raise chain never terminates. Concurrent remote patches routinely create the stale or boundary-touching selections that drive this cycle, and a related isActiveAnnotation 'partial' mode flaw reports activity for selections that cover no annotated text. The fix aligns the guard's selection resolution with the remove operation, requires covered text for 'partial' activity, and depth-limits behavior event chains so cycles fail with a console error instead of overflowing the stack.