If this is an old version, I think you need to test a newer version to see if its addressed.So my OpenBlocks item cannon isn't working quite right. It doesn't send anything from the quarry to the vacuum chest at my base at all until I go into the chunk where the cannon is at. The quarry and the cannon are in loaded chunks.
I almost crashed the server when I went there this time:
Any ideas why this might not work? I ran 3 ender quarries through this setup prior and it went fine, now this time it doesn't work well at all. (not asking for bugfix, old version, etc)
You should also test to see if you have a different experience in single player.