Duplicate folder issue
I created a folder for a campaign and built out the assets etc... but every time I log in to Marketo I first see a duplicate of the folder and I'm not able to expand or see the assets in either:

When I refresh the page, I then see a single folder and can expand it as normal

It doesn't matter how many times I log out and in, close the browser, restart my computer etc... it always appears this way when I first log in to Marketo and it's been doing this ever since I first created the campaign a month ago.
It's a minor annoyance but does anyone know what causes this and how I can fix it?