Excellent video, @RenanAz! One thing I’d be curious about is what you see in Windows’ global clipboard viewer. After you have copied a value, press Windows Key + V to open the clipboard viewer. Do this just before pasting to the spreadsheet too, to see if you’re getting the data from the top of the clipboard, or perhaps something a little deeper within the list.
I suspect the extension may indeed offer relief; it looks like this issue is not likely caused by anything Brave is doing. Instead, it seems as though it may be due to the fact that we don’t ship Brave with this extension baked-in, and enabled.