Problem

1. Delay timer race. handleHide scheduled a setTimeout that was never cancelled. Re-hovering the toggler during the delay.hide window still dismissed a visible tooltip/popover under the cursor. Symmetrically, the show timer kept running after the pointer left, flipping internal _visible state (and aria-describedby on the toggler) for a tooltip that was no longer mounted.
2. No cleanup on unmount. Pending timers fired after unmount and the Popper instance was never destroyed.
3. Child handlers overridden. cloneElement replaced the child's own onClick/onFocus/onBlur/onMouseEnter/onMouseLeave instead of composing them — a silent, hard-to-diagnose bug for consumers.

Changes

• Track the show/hide timeout in a shared ref and clear it on every show/hide transition (the same single-timer approach Bootstrap uses).
• On re-show while still mounted, schedule the show timer directly since the [mounted] effect won't re-fire.
• Clear the pending timer and destroy the Popper instance on unmount.
• Call the cloned child's original event handlers before the tooltip/popover trigger logic; typed the cloned child as ReactElement<HTMLAttributes<HTMLElement>> instead of any (also clears a pre-existing no-explicit-any lint error on these lines).

Tests

5 new regression tests (3 tooltip, 2 popover): re-hover during hide delay keeps it visible, leaving before the show delay cancels the pending show (incl. no stray aria-describedby), and child handlers still fire. All 5 fail against main, pass with the fix. Full suite: 127 suites / 353 tests green, no snapshot changes.