Only happened once and I've not managed to replicate it, but might indicate an issue with the zoom switch (or might just be dirt inside triggering it).
Canon PowerShot G5 Digital Camera Plus Lowepro Bag
Canon Powershot G5 X MARK II (5 multiplier_x )
Canon PowerShot A1400 Digital Camera 16.0 MP with 5X Digital Image Stabilized Zoom 28mm Wide-Angle Lens and 720p HD Video Recording 2.7-Inch LCD Black (Renewed)
Canon PowerShot SX400 Digital Camera with 30x Optical Zoom Red (Renewed)
Canon PowerShot S90 digital camera (10 Megapixels, 3.8x optic). Zoom 7.6 cm (3 Inch) LCD Display 1:2.0-4.9) Black (Renewed)
Canon PowerShot G7X Digital Camera (20.3MP, 4.2x Zoom)
