Some fans of the show think magnets are used to manipulate the machine.
The line-up for Thursday's show did not score highly with viewers.
Fans praised the host for keeping it together.
Host Ben Shephard said it was 'fabulous' news.
The presenter said Alan had been 'a gent and great fun' on the show.
The presenter is taking time off from the morning show to film 'Tipping Point' after filming was suspended back in March.