Too less information so far and not reproducible for me.
Maybe you can give some more information?
Is the mouse cursor constantly a hand symbol or only when the left button is pressed?
Usually the zoom pan command is quit with ESC or right click, does this change anything when the problem occur?
Possibly this is caused by some kind of keyboard malfunction?
I sometimes have the CTRL key locked, when I'm using remote sessions.
It seems context switching keeps the CTRL key flag active even when the key is released.
Pressing the CTRL keys again, left and right, one by one, usually solve the issue for me.
Because CTRL - left click is the shortcut for zoom pan, this could be a possible source for constant zoom pan.
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