A20.3: Voxel issues from past many alphas persist

Summary: Digging/mining occasionally produce voxel issues that are unlike any marching cubes you would expect

Game Version: A20.3

Platform: PC

OS/Version: Win10

CPU Model: I5-2500k

System Memory: 16Gb

GPU Model and VRAM: Gtx 970

Screen Resolution: 1920x1080

Video Settings: Medium

Game mode: SP

Did you wipe old saves? No. Reported similar issues in past alphas where i did wipe.

Did you start a new game? Yes

Did you validate your files? Yes

Are you using any mods? Yes, i am using Sorcery this time. But i reported similar issues several times in past alphas with no mods. Also, this mod does not alter anything existing, only adds to it.

EAC on or off? On i believe (whatever is default)

Status: Old but persisting

Bug Description:

Detailed steps to reproduce the bug:

1) Play the game like a tunnel dwarf

2) Dig a lot

3) Eventually, voxel issues will arise. At least they do for me every single alpha. Sometimes straight away after digging just a little, sometimes it takes a while and usually at specific block depths. Either way, i get them every alpha. Usually i get them while mining deep underground. This time however, the first appearance was while digging clay already at the first/second layer down from the RWG.

Actual result: (description of what is occurring)

Voxel issues occuring, which shouldn't even be possible with marching cubes (assuming that is what you use) unless the voxel data itself is being recorded wrong.

Expected result: (what you expect to occur)

No voxel issues. Marching cubes functioning as expected regardless of terrain manipulation.

Video example:

Output log:
https://pastebin.com/1BVfy87r

map_info.xml:
https://pastebin.com/s8cpPsCu

GenerationInfo.txt:

There is no GenerationInfo.txt. Did you change something in A20.3 but forgot to update the bug report read-me-first? My previous RWG's have had this file. This is the content of the current RWG folder:
https://ibb.co/JjmXmpv

If i remember correctly, the generation seed i entered was "SorceryWorld", as this mod was what got me playing again this alpha.

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