Mining bug (wrong ore being mined)

Kingsmarch mining. 1 solo miner allocated to mining Verisium. This miner will incorrectly also mine bismuth. Display shows Bismuth being mined and 'Ore to Mine'quantity for Bismuth decreasing, when no miners are set to mine Bismuth and the only miner allocated is to Versium.

Steps to Reproduce:

1. Unallocate all miners
2. Assign one or more miners to mine verisium
3. If bismuth is available to be mined, it will be mined.

Screenshot here:
https://imgur.com/a/w6urU8B

The in-game tooltip for miners/smelters explains they will work on other ore when they run out of their assigned ore to work on.