I'm experiencing an issue with Angel's Refining.

When I'm putting down a mining drill, green squares (not unlike the ones that used to be part of the train signal block debug view) are displayed over any ore types added by Angel's refining.

The issue does not affect any infinite ores, or any ...

I don't think it's unfair to say that fluid handling is the least fun part of Factorio. Barrelling allowed people who would rather not engage with the opaque and frustrating mechanics of pipes and fluid dynamics to opt-out of that system in the areas where it became most frustrating: long distance ...