It was "just a delay," she said.
The same ride malfunctioned in March when a wheel component became loose and stranded 13 guests, some for as long as three and a half hours.
Firefighters were called to rescue riders during the March incident but a Queensland Fire and Emergency Services spokeswoman said the park had not called for their services on Sunday.
The incident occurred days after the theme park's 16 attractions passed a safety audit triggered by an accident at Dreamworld that claimed four lives when the Thunder River Rapids ride malfunctioned.
That park is yet to reopen.
With AP, AAP, news.com.au