So the several hours later those items were delivered. I tested that further and learned that when I move to spawn for a moment (no chunkloaders in my base) and then return to my base the items that were not delivered within 20 minutes spontaneously got delivered. That makes me wonder if Craftersland has the background threads that handle the logistic pipes artificially throttled?
There is a setting in config/LogisticsPipes.cfg, section: multithread where threading settings can be configured.
multithread {
# Number of routing table update Threads, 0 to disable.
I:count=4
# Priority of the multiThread Threads. 10 is highest, 5 normal, 1 lowest
I:priority=5
}
This is the default setting. Now my guess is that either the priority or both have been lowered, which then effectively renders the mod unusable.