Sunrayn wrote:We aren't talking about unsupported tunnels collapsing though. We are talking about fully supported tunnels disappearing and not allowing us to reopen them due to the game telling us there is a unalterable section of ground in the spot the old tunnel was. This occurs after about a R.L week. Completely different thing. Just last night, I had a stone pit mine that had supported walls and wide open to the sky just disappear. The only signs it had ever been there was a line of rocky and dirt terrain covering it that couldn't be tunneled again.
The tunnel supports decay I believe, independent of object decay setting. After the supports decay, the tunnel collapses over time as well.
However, the fact that the tiles are locked after this seems to be a bug that should be reported on Mantis