No mods. Sorry, I updated the original message. The host's game did *not* crash. He said it crashed in our voice channel when the desync occurred, but I asked him about the crash log and he said it never actually crashed. Instead, his game froze for the short duration that I was getting desynced ...

Here's my desync report: https://drive.google.com/file/d/1K02uuKx090jpIMb8U5A8UVVaSwHUxB7f/view?usp=sharing

I'm not using any mods (other than Space Age).

What I was doing seconds before the desync:
- Copied and pasted entities on Gleba, allowing the entities to be fully built before doing ...

02-19-2026, 21-48-35.png

I created a modded entity which is a cloned and modified steel chest.
Rocket turrets are shooting this modded entity with capture robot rockets.
Possibly related: The modded entity has the prototype flag "breaths-air".

02-19-2026, 21-39-13.png
I verified that the ...

Here's the entity in the debugger, appearing to exist at a certain position.
06-08-2025, 23-21-54.png

Here is my character standing at the position where the entity was created but made invisible somehow. My selection box is not on the position in question.
06-08-2025, 23-23-13.png

To be very ...

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05-16-2025, 13-01-28.png

My mod adds a selection tool that should select certain entities. With a very permissive `mode = {"same-force"}` and no entity filter, the selection tool should be able to select the burner mining drill and my custom entity, but it doesn't ...

The core cause of this problem was partially fixed (https://forums.factorio.com/viewtopic.php?t=127900).

It's happening with my mod still. To reproduce the bug:

1. Start a new game with default map and mod settings.
2. Click on the hex core entity.
3. Click on the green button in the custom GUI ...

+1
to open the Factoriopedia to some item

03-30-2025, 21-23-26.png
03-30-2025, 21-24-01.png

In one image, the layout is working as expected. In the other image, the layout is incorrect, as you can see the line going through the sprite button.
On top of the layout being incorrect, the "Claim Hex" button is not clickable and its color ...

It turns out you can use /swap-player <griefer> and then press Ctrl+Z.

Sorry for the bump, but for anyone who needs this, you can use /swap-player <griefer> and then press Ctrl+Z.

Make a blueprint. Set its icon to an entity with any quality. Make an upgrade planner to upgrade that entity's quality to another quality. Upgrade the blueprint with the upgrade planner. The quality of the entity in the icon does not get upgraded, but any entities in the blueprint do correctly get ...

Three bots over fiery terrain are trying to repair something (with nothing there) unnecessarily. It can be stopped by disabling the personal roboports with Alt+F, but this is certainly a bug. I attached the save file in case it helps in debugging.

This is very obviously supposed to be "2.6" instead of "2.599999...", since uncommon quality is generally a 30% bonus on top of normal quality, and I don't see anything else with such an error. Definitely not a game-breaking bug, but it'd be good to make sure that the GUI stays clean and ...

The blueprint preview is showing heat pipes that look like they are connected to another heat pipe (in a 2x2 arrangement) even though there isn't one there. This was caused by creating the blueprint with the heat pipes in that 2x2 arrangement and then right clicking on the lower right heat pipe in ...

TL;DR
Allow admins of servers to force-undo for other players.

What ?
In the current state of the game and I expect even in version 2.0, when a griefer on a server does significant damage, it's almost impossible to recover and the easiest way to do it is to rollback, potentially losing some ...

Oh! That was my server. That must be part of the scenario code, which I didn't write. Sorry. The new scenario that my server runs is written by me, so it won't have any weird "time played" exploit.

Factorio 2024.02.04 - 01.49.47.04.mp4

The leftmost lane of the iron plates is fully compressed; no gaps to be found anywhere. As it moves forward, a gap frequently opens up from the same tile.

I reloaded the save in single player twice and it was happening both times.

I tried using circuitry to ...

It would be nice if trains going to higher priority stations also had higher priority in pathfinding. Imagine if a bunch of lower priority trains at an intersection all stopped momentarily for a higher priority train to fly through without stopping. That would probably be difficult to implement, so ...

Can't wait!

I don't know of a way to reproduce the crash. My friend suspects that it was caused by attempting to delete a blueprint book from his character's inventory right as the game auto saves. He says that the progress bar for the saving was halfway done when it crashed. The save file I provided was the ...