Pix4DMapper Inconsistent Image Quantity

Hi everyone. I made a drone flight as always without changing my settings. However, the drone has captured more photos than it should have.

If you look at the attached image, the 1st-3rd-5th-7th-9th lines have more images than other lines. What could have caused this to happen?

What kind of drone do you have? You might want to check to see if there are any firmware updates available.