So basically what happens is.... after properly setting up everything, it runs fine for a good while (like several irl days, over the course of several sessions of course), then it suddenly stops. That is to say: it still runs, but it mines nothing. The tracker will still say the chunk it is in, it runs regardless of what dimension I'm in (cause muh chunkloading magics), it still runs, but it doesn't work. Taking the builder card out and doing a different location from the original one and running it makes it work just fine, until whatever happens happens

Steps to reproduce:
Really don't know. I tried setting up a massive quarry (well, 1024 chunks), and I didn't notice it had stopped until it was around chunk 70.
As for the setup, its in the mining dimension, with a dimensional transceiver for power, hooked up to the builder with an enhanced energy conduit (intentionally slowing it so it doesn't flood the receiving end), and has an ender chest on top which then goes to an end chest in my base in the overworld, and dumps into my refined storage system. Ah, and also has a regular fortune quarry card in it. As I said, everything works just fine for a long period of time, then it just stops grabbing stuff. Can't tell if its still turning things into dirt....but it's definitely not pulling anything.

Currently moving it into the deep dark, and I'll see if it stops in the same chunk range as before.

Versions:

• Minecraft: 1.12.2
• FTB Revelations Pack v2.5.0
• RFTools:1.12-7.56 (it's in a modpack so i just listed everything that looked like a version number :P)

FYI: Fixed it with a new Builder and Quarry Cards. Don't know why it now works, but it works fine now.

Hey, i've the same issue right now.
It worked just fine until i changed the quarry card from normal to fortune. Did make a normal card and tried again, but the same issue there. It's like something is blocking the quarry to work further more.

Attached you can see a chunk which i quarried many times to get ores and some ores came out of the chunks, but not all as you can see.
It's in the deep dark and the first two rounds worked just fine.
Did also made a bigger one and this one stops always at chunk 5.

Versions:

Minecraft: 1.12.2
FTB Revelations Pack v2.7.0
RFTools: 1.12-7.59