TurnActivityIndicator returned null whenever the turn went quiet, so each working/idle flip remounted a role=status aria-live node and screen readers re-announced it. Latch once shown; while idle keep the row as an empty, sr-only live region (still in the a11y tree) instead of unmounting, and only mount the pulse/timer while active. Co-authored-by: LINGJIAKUN <200388706+LINGJIAKUN@users.noreply.github.com>