Has my Home Made soda gone bad?

I attempted to make homemade soda using a ginger bug, employing a method slightly different from the one shown in the tutorial video. For the initial fermentation, I simmered strawberries in a small amount of water. Unlike the video, where they separated and removed the strawberries and then mixed the water with the ginger bug for the first fermentation, I added the strawberries along with the water to ferment for about three days, similar to the process used for kombucha. This initial stage proceeded without issues.

During the bottling for the second fermentation, I strained out the strawberries and ginger pieces using cheesecloth and added a bit more sugar to enhance the flavor. After approximately a day, small balls formed in the drink. It is now around day three, and I observe some bubbles at the top, indicating carbonation. However, I am concerned about the presence of these balls: Could they be mold? Is this a biological contamination? Is the soda safe to consume?

https://preview.redd.it/rj9hjna9f2pe1.jpg?width=3024&format=pjpg&auto=webp&s=ce7dffd09cbac057aa82316b6bb35f05fd0ba314

https://preview.redd.it/ez8sjnt9f2pe1.jpg?width=3024&format=pjpg&auto=webp&s=136e0ae955e8e3f590148a41d8da7c892a108229