luci_statistics pages for df and interface are incorrect.
The luci_statistics page for df fails to display the graphs. I copied a version of df.lua from a previous installation to /usr/lib/lua/luci/statistics/rrdtool/definitions/df.lua and now it works.
The luci_statistics page for interface fails to show the interface id and shows a lot of empty graphs. Here is the diff for the correction to /usr/lib/lua/luci/statistics/rrdtool/definitions/interface.lua
diff interface.lua /usr/lib/lua/luci/statistics/rrdtool/definitions 15c15 < title = "%H: Transfer on %pi", --- > title = "%H: Transfer on %di", 51c51 < title = "%H: Packets on %pi", --- > title = "%H: Packets on %di",