That doesn't seem right.
It's the iframely plugin, I don't know why it's using window.open instead of just target=_blank. Maybe some kind of tracking thing?
Well I don’t use that plugin. So, not sure where to look to isolate for a bug report.
In my NodeBB admin area the latest version of nodebb-plugin-imgur is 0.1.4. However, looking at the GitHub repo, version 1.0.0 was released 5 days ago. It doesn't give me the option to update the plugin in the admin area. How else can I update to version 1.0.0?
npm update nodebb-plugin-imgur will install the latest version from npm. Do remember that when you do this with any plugin, you won't get the compatibility warnings if the plugin is not compatible with your NodeBB version.
The ACP page should show the latest version now.