MCreator issue tracker has been migrated to GitHub.
Existing tickets have been migrated to GitHub. Please open new tickets on the GitHub tracker instead. If you do not have a GitHub account, all feature requests and bug reports from forums are still considered and checked by the maintainers.
I am sorry to hear this. I was unable to reproduce this in Chrome, so, for now, I would suggest downloading in another browser. It could be some plugin doing this.