Coordinates show -0.00000 when landing on y=0 after jumping

The y coordinate will show -0.00000 in the "XYZ" line and -1 in the "Block" line of the F3 screen if you jump without moving sideways and land on y=0 (i.e. on a full block at y=-1). It resets to 0.00000 and 0 after moving sideways.

Before jumping:

After jumping: