Dropzone will try to attach twice.

[sujeetjaiswara]

I am getting twice the file browser window.

[sconix]

I would look for the errors somewhere else, at least the browsers I use wont even allow opening file browser window twice. Anyway if there is a such bug its in the Dropzone and not in this library, but I highly doubt thats a bug in the Dropzone neither since what you are describing should not be even technically possible.

[presola]

I currently have the same error.
How to replicate:

1. Use an invalid URL so that the request will fail
2. Click on the dropzone to select a file
3. Notice after first upload, it opens the file selector again.
   Happens on chrome

[JackEdwardLyons]

I've also noticed this on Edge browsers - the file upload window pops up twice (sometimes you have to upload twice) before allowing an image to be attached. I followed another issue and found the solution here:

react-dropzone/react-dropzone#252 (comment)

[AhmedBHameed]

I'm using next.js with

[...]
"next": "10.0.5",
"react-dropzone": "^11.2.4",
[...]

I confirm this issue.
PS: Only chrome issue. Works fine with Firefox.