If you're looking for advice on how to keep yourself safe online in the midst of all these data security breaches, then take a look at our guide here.
Bugs like this happen from time to time and companies are usually very swift in correcting the issue. The larger issue is that this bug would only be possible if passwords were stored as plain text, which is a large security concern for many people as we would expect a database held by Facebook to have some level of encryption.
Instagram told The Verge that while some users who used the 'Download Your Data' tool had their passwords displayed in the URL, this would only have been visible to them and the problem has now been corrected. Once again, they recommend that if you have used this tool, changing your password just to be safe would be a wise course of action.