There is truth in @DmitryGrigoryev comment. However, on the Raspberry Pi GitHub site, there is an opportunity to file an Issue or a Bug Report.
In this case, it seems the Documentation repo would be the place to go. If you're not familiar with the GitHub interface, you are looking for the "Issues" tab at the top of the page. Clicking it will take ...
You may want to introduce a powered USB hub between the Pi and the Nano so that the power is coming from the hub rather than the Pi.
As an aside you can also power the Pi itself from the same hub, so the only powercable you need is the one going to the powered hub.