There is confusion as to the x position when moving a vertical straight line selection with the arrow keys. The same is true for horizontal straight lines.
This 1.52u regression is fixed in the latest ImageJ daily build (1.53b16).
Here is small macro that can be used to reproduce the problem:
newImage("Untitled", "8-bit noise", 17, 2048, 1); makeLine(0, 0, 0, 2048);
I’m using FIJI 1.53a25. Looks like it came back…I get the same results with your macro image followed by “k” -live. If I left arrow to zero, then right arrow once, the line moves, but the button bar stays at zero.
This fix is in the ImageJ 1.53b16 daily build. To upgrade, use the Help>Update ImageJ command and select “daily build” from the drop down menu.