Board Thread:Questions and Answers/@comment-69.35.195.55-20140127053923/@comment-69.35.193.187-20140128101054

Problem solved! Apparently you can not connect advanced insertion pipes to the bottom of a diamond chest and get 100% success of transmission from pipe to chest. Perhaps that is written somewhere, but I never saw it. I moved the connection to the side of the chest and all items make it into the chest as they should. Apparently, when connecting to a chest from the bottom, I had never used the advanced insertion pipe (or at least never noticed that I lost items), so had never experienced this problem before.