when holding bound key for vein mine, the highight for blocks are misshapen and incorrect. this problem also occurs with the construction wand, and will place down blocks randomly.

To Reproduce

Teleport to coordinate (100000, y, 100000)
Hold any construction wand in hand
Try to place blocks (Creative mode or otherwise)
The preview grid will start to appear glitched

Further Information

The farther you go into higher co-ordinates the more severely the grid will break.
It happens in both, the positive and negative directions
(Speculation) Seems like an integer overflow error maybe?

Marking as external issue for now, until I get a response from the mod authors.