Maybe we can resolve an old bug that seems to still be present. After you move or copy a file to another window, the original window leaps across to the right. You then have to manually scroll the window back to the left. Very annoying and seemingly still present after all these years.
Thanks for report & sorry for the very late reply! Cannot reproduce this. Neither with thunar 1.6.11, nor with master. Did it always happen for you, or only occasionally ? When moving a file from one window to another, ofc the original-window will mark the next file on the right, since the moved file is not there any more. I dont think you refer to this effect ? Could you please test if the bug is reproducable for you with 1.6.11 ?
Since there is no further information, I will close the bug for now. Please feel free to reopen if it is still an issue for you !