When breaking a block, the sound is centered on the southeast corner of the block. When using a block, the sound is centered on the northwest corner of the block. When placing a block, the sound is centered in the middle of the block, where it is supposed to be.

The issue is more evident when using headphones. This does not apply to devices or games in which stereo sound is turned off.

This video provides an example of what this sounds like in-game:
https://youtu.be/yOyTvI2yqgA