Positional Bias of the Triangular Notches

Photo date: October 21, 2019. Photographer: Mark Mahin.

I took the photos below while photographing only ordinary drops of pure, clean water falling in front of a black featureless background.  In the first two we see strange triangle notches in the top left corner of some orbs.  In the right photo is a triangular-shaped veil-like structure.

In the next photo we see some similar-looking strangeness:

In the next photo we see some similar-looking strangeness:

In the next photo we see some similar-looking strangeness:

In the next photo we see some similar-looking strangeness:

In the next photo we see some similar-looking strangeness:

Note that all of these identical-looking notches all appeared at the same position on the orbs.