[Bug]: Non-developed towns and cities grow faster than others

[kaomoneus]

Version of OpenTTD

12.1.slowpace-1.1

Expected result

Non-developed towns shouldn't grow, or grow at very insignificant rate.

Actual result

Currently towns which are not developed grow faster than ones we build infrastructure in.

Steps to reproduce

1. Start new game with slow pace
2. Develop few cities for a few years.
3. Leave game in autonomous mode for 5-10 years.
4. Observe result.

[kaomoneus]

Looks like we missed something in 5da40ef

[benjamin-kirkbride]

I am super impressed with this patch. Has an progress been made on this issue?

[kaomoneus]

Hi Benjamin!
So far I didn't found any suspicious parts in code. I noticed that growth rate is quite random, and even in legacy mode some towns are growing without being developed by players. Currently I'm running server, and town growth seems to be normal.

[KeithWM]

I just also left a save game (on 7.5 day mode) running for about 30 minutes, when I returned halfway through february, all my towns had exploded! I was running it fast-forward, not sure if that makes a difference.

[kaomoneus]

Which version do you use? Could you please attach a savegame?

[KeithWM]

Version 13.4.slowpace-1.3.1. I gave up on the game in question, because I don't like having to work with towns that big, but I am running a save from before the explosion again on fast-forward to reproduce the situation.

P.S. My issue is not so much the difference between serviced and unserviced towns as the sheer speed at which development happens.

How do I attach a savegame?