Any progress?

Appreciate it.
Would also be nice for the mod to remember the line/plane build setting between pressing alt, or to simply have an option to force desired build method (ie cutting out the need to press alt and merely hold and drag to build) but those are obviously secondary to fixing a major bug.

Ooooh I did experienced the same issue but could never replicate it completely to debug the issue in the code. Now you have narrow it down I might be able to locate the issue in the code. Ill give it a try when i have the time to setup the coding enviroment 😊

One rather noticeable and frankly concerning issue: if you hold alt and drag the mouse (instead of merely pressing alt), it will constantly consume the item you're trying to build with but not build anything. Ate my entire stack of 100 mandragoras.

Very very interesting