Encountered same bug 3 times. Arrow gets yeeted outside screen when replaced by another arrow (Top of screen) Can't regrab. *Not sure if it has to do with arrows, but all three times arrows were involved.
<3
At the top there's always the "reorganize" message, the items the go behind it can still be grabbed, but they can't be seen, you probably had this problem more with arrows because they are very flat. if my thesis is correct, just try to click at random behind the massage at the top of the screen and you should grab the arrow