The concern for the Hinwil-based outfit will be surrounding the gearbox after a number of problems last season.
Bottas' issue triggered the second red flag period after Red Bull's Sergio Perez shed a sensor array in the first 10 minutes of the day.
The Mexican was not adversely affected by the loss of the sensor, but race control determined marshals would be needed to retrieve the debris from the racing line on the exit of turn 10.