In the info lines I prefer integer coordinates for easier visual processing, so I configured the coordinate format to round to zero decimal places (%.0f). This leads to the double value being rounded to the nearest integer, meaning the coordinates change at xx.5, so in the middle of a block. It also means that the (integer) value of the block coordinates in the debug screen can deviate from the value shown in MiniHUD, as the block coordinates are always rounded down (Math.floor).

I would love an option to display the block coordinates in MiniHUD: an integer version of the current coordinates, that uses rounding down instead of rounding to nearest.

I just realized that the block position line does exactly that, I just didn't find it, because I was looking for a display option rather than a separate info line. I'm so sorry for the spurious opened issue!