What is the problem?
whilst using the touch UI interface with my 7" touchscreen and viewing plugins that use the Plotly graphing feature (BedLevelVisualiser, Tempgraph)I have sometimes accidentally touched on the link at the far right of the menu bar which takes you to the plotly website, from here I've been stuck in this web site unable to get back to the octoprint interface.
What did you already try to solve it?
swiping up, down, left & right with one & two fingers, pinch zoom gestures etc. usually I end up rebooting the system from another interface, restarting the server has no effect.
Logs probably not much use in this situation.
OctoPrint 1.3.12 running on OctoPi 0.17.0