Some information

Operating system: Windows 10
Java version: Version 8 update 181 (build 1.8.0_181-b13)
Minecraft version: 1.14.4
Baritone version: v1.3.4 i guess, whatever version is on the README.md under 1.14.4
Forge mods (if used): None

I used the command #mine coal_ore and left it running in the background. Came back to baritone trying to place a block in order to reach the coal ore. For some reason it wouldn't. I do have spare blocks in my inventory and in my hotbar. Cancelling and typing the command again yields the same result. Video showing the issue

This looks similar to #60