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... from a terminal or from a running script often leads PCMan to default to displaying the user's home directory (as it should). But just as often it becomes unstable, freezes and, in detailed list view, erases parts of the right pane (as it shouldn't) and can then only be recovered by closing and re-opening the window.

P.S.: this is about PCManFM 1.3.1

Cannot confirm.
But if you want to file a bug, this is not the right place.
This appears to be the right place: https://sourceforge.net/p/pcmanfm/bugs/