fix(Popper): resolved alignment issue for multiple renders (#11846)

Author: thatblindgeye

packages/react-core/src/helpers/Popper/Popper.tsx

@@ -486,6 +486,7 @@ export const Popper: React.FunctionComponent<PopperProps> = ({
       setOpacity(0);
       transitionTimerRef.current = setTimeout(() => {
         setInternalIsVisible(false);
+        setPopperElement(null);
         onHidden();
       }, animationDuration);
     }, exitDelay);