As stated in the title, the SirWilli tank stopped receiving lava for all players around the server. Is there a transfer capacity threshold for the SirWilli original setup?
Currently there are issues preventing the forced chunkloading of Spawn. Our Admin team is looking into this, but until a fix is found, when spawn unloads, the SirWilli Tanks will stop working. As Chugga said above, just hop to Spawn to load the chunk, and this will reactivate the flow of lava.