I can only find this in 1.16.4.

Bug Appearance

• Just Arrow

Description

This is a very random bug, when I was making a map, I put dispensers on the platform. But suddenly, I found this arrow that was dispensed by air and no horizontal momentum range. It was used to when I was using command blocks with the same speed delay within the arrow spawns and the hopper. It's very random. It won't last long as it despawns.

I have no idea that happens. I guessing that due to the dispenser.

This bug was not a very bad bug, just this.
By the way, the arrow despawns.

Watch the video that was true.

Extras.

Visually this happens to be 25% to 50% of this chance. Althrough because of the timings or something.