• Minecraft version: 1.16.3
• CC: Tweaked version: 1.93.1 (the default for 1.16.3 on CurseForge)

It seems that when using any of the dig methods with a digging turtle, the turtle uses the shovel to make a grass path instead of picking up the block. If the turtle is on top of the grass block and you run turtle.digDown(), nothing will happen as the path block can't be made with another block on top of it.

To reproduce, place a digging turtle facing a grass block, then run turtle.dig().

This is working as intended. In the same way hoes on dirt make farmland, shovels on grass make paths.

See dan200/ComputerCraft#127 for the original feature request

ah, gotcha.