Error during replying to a comment led to comment being posted independently

[jywarren]

I left a comment reply on this comment: https://publiclab.org/questions/warren/05-06-2021/what-kind-of-spatial-acidity-variation-could-be-evidence-of-pollution-source-in-a-river#c28718

However i saw a red "Error" message appear when I submitted it. When i reloaded the page, my comment appeared by itself instead of in response to the original comment.

[TildaDares]

@jywarren I'd like to work on this.

[TildaDares]

@jywarren I can't seem to reproduce the error locally.