RFTools Builder skipping blocks

[obnys]

Greetings.
I'm not sure if this is related to the builder. When using the builder as a quarry, many blocks in the defined area get skipped regularly and I can't find any hint in the logs.

The versions I use:
Minecraft 1.18.2
mcjtylib 6.0.15
RFTools Base 3.0.9
RFTools Dim 8.0.7 (but it happens in Overworld/Nether as well)
RFTools Builder 4.0.13

My Setup: Builder with fortune quarry card, all materials voided (incl. tags), no filter. Tesseract attached directly for power (no shortage). Enderchest attached directly (the other EC is connected with an AE2 import bus with max speed upgrades). The dimension of the area in this test was 50x50x184. I was standing afk next to the quarry to make sure it is not a chunkloading issue.

Do you have any idea what this might cause?

Many thanks in advance for your help. =)

[obnys]

Actually there's no RFTools-related bug. While doing additional tests it turned out the enderchest was the issue. Maybe the import bus was not fast enough. I switched to item transfer using tesseracts and a ME interface. Now the quarry works perfectly. Apologies for the false positive. :-(