Baritone cannot clear big floating platform

## Some information
Operating system: Linux
Java version: 1.8.0_332
Minecraft version: 1.12.2
Baritone version: 1.2.15
Other mods (if used): OptiFine, BetterFPS, FPSReduce

## Exception, error or logs

N/A

## How to reproduce
* Build a 20x20 wooden platform 10 blocks above the ground

* Use `#sel` command to select whole platform
* Stand on one of four corners
* Use `#sel set air` command to break whole platform
* Baritone starts infinite pathfinding

## Modified settings
* blockReachDistance: 3

## 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.