I think your typing
next caused an issue. Sorry about that, but in one instance at least it seems certain code in the previous url causes an issue for the following. You can likely refresh and that'll set things right.
I can't tell or explain better, though, as I don't have all the information.
If my rather vague answer doesn't help, please send us the url, paste in the code you're using and format (i.e., escape) it (that can be a bit tricky, so try it, but if doesn't work, ignore this step), and also post a screenshot of your entire browser.
We can then help you out further!