Comment 35 for bug 1816018

I've also encountered this issue multiple times, except in single player and with normal, manual saves. Looks like it's the same bug though, so I'm posting it here instead of opening a new bug.

OS: Manjaro 64-bit
Version: Occurs in Build 20 as well as bzr9141. IIRC it occured in Build 19 as well, but I'm not 100% sure.

Sometimes when reloading a saved game, some wares get stuck at flags and are no longer transported to their destinations. This can result in construction sites never getting finished or production sites never receiving some of the the raw materials.

This happens frequently enough to be somewhat annoying (I guesstimate 10% of my normal saves being affected).

When inspecting the destination building after the bug has occured, the icon of the needed ware is darkened (as if it's en route). However, the ware is lying at a flag and never getting picked up by any carriers, even if they're all idle and the road to the destination is clear.

Getting the ware to move requires intervention from the player (waiting even for several hours doesn't help). Destroying and remaking the roads connected to the flag seems to be the most reliable, especially the road going in the direction the ware was supposed to go.

I can reproduce the bug semi-reliably using the steps in #8, with the following differences:
- I start a single player game, not a multiplayer one.
- Instead of killing the client, I pause the game with PageDown and save manually. If I pause too early I hit PageUp and PageDown in quick succession to advance the time in small steps.
- Sometimes it's not the ware that was being dropped that gets stuck, but another ware waiting at the HQ's flag.