https://gfycat.com/UnconsciousMadeupEel
To Witness Issue
- load mod that added the charcoal item (fws_0.1.11): https://mods.factorio.com/download/fws/ ... 000b412b43
- load save which has full belts of mixed items, everything is fine:
- remove mod and load save, static items on belt with gaps occur.
- if you interact with the belt in any way it recovers.
In the real game the belt was a long straight with many splitters sending fuel down feeder lines to furnaces, rather than it being a loop as per this demo. However, the belt was fully backed up and stationary with the mixed items prior to the mods removal.