mining scaffhold blocks

## Some information
Operating system: windows 10
Java version: idk doesn't matter
Minecraft version: 1.12.2
Baritone version: 1.2.14
Other mods (if used): impact

## Exception, error or logs
nah

## How to reproduce
I made baritone mine dirt and then it went to find more dirt using already mined dirt as scaffhold. But it then destroyed said scaffhold cuz it's dirt. It kept doing that for a bit until it started going into another direction

## Final checklist
- [x] I know how to properly use check boxes
- [x] I have included the version of Minecraft I'm running, baritone's version and forge mods (if used).
- [x] I have included logs, exceptions and / or steps to reproduce the issue.
- [x] I have not used any OwO's or UwU's in this issue.