Issues using Nautilus on a touchscreen
This seems to be an known issue with Nautilus. To be precise, it seems like one of a few issues of the kind. This page documents other users with the same and related issues which have been reported.
You should file a bug report here just to let them know that the bug is still present. Without users like you to report on these issues, they would forever remain issues.
Even if someone else has filed the exact same report, Severity is often calculated by the amount of reports recieved.