I’m seeing the exact same problem, screenshot below (taken by my client):
https://s9.postimg.org/f2kxjmngf/IMG_4498.jpg
I do have lots of custom styling on the site for a custom theme and Woocommerce install. What are the fields for the price and quantity in the printed invoice? What would I have to change to make sure it doesn’t run on like that?
EDIT: I just tried printing on my end (as a PDF) and all the columns appear to be separated nicely. Was there an update that went out today? Perhaps a conflict with another plugin? I don’t want to make any changes if the issue seems to have resolved itself, but it would be good to know what to look out for.