[2.0.72] Gradual UPS loss by conditionless idle platforms in automatic mode

[470lm]

What did you do?
I've set 3 out of my 17 platforms to wait in orbit without any unfulfilled conditions or follow-up planets, as such:

02-12-2026, 16-24-06.png (28.71 KiB) Viewed 188 times

OR

02-12-2026, 16-28-46.png (24.08 KiB) Viewed 188 times

The interrupt (not a culprit):

02-12-2026, 16-24-53.png (65.1 KiB) Viewed 188 times

What happened?

UPS gradually dropped over time. In the "Space-platform" line in F5 view, it went from a stable 0.095 (while every platform is idle at least), up to, but possibly not limited to 15.XX. This value was reached after the save file ran uninterrupted for about 2 hours. Their impact on the update time is immediately visible as soon as they are in a scenario described before and while they are not in paused mode, instantly going to 0.185 on a fresh reload and slowly climbing.

At 15.XX each platform contributed approx. 5 to that value, I observed this while I was manually deleting them in editor mode, and then later just pausing them or changing their wait conditions.

By adding a condition which is yet to be fulfilled, i.e Damage taken = 1000, they are instantly fixed and lose their impact on the update time.
A condition which is already fulfilled as seen above (A =1), will cause the bug to appear.

EDIT: The problem causing platforms were: Science transport, Holmium export, and Carbon fiber export

Does it happen always, once, or sometimes?
Always.
Note: my save file is heavily modded and haven't tested this on a clean save.

[Loewchen]

Post log and save please, see 3638.

[470lm]

Post log and save please, see 3638.

Done, updated the OP

[Rseding91]

I'm trying to reproduce this however 4 of the mods in your save are not available on the mod portal.

02-12-2026, 11-08-59.png (11.13 KiB) Viewed 133 times

And without them I'm getting this error:

02-12-2026, 11-10-43.png (25.54 KiB) Viewed 128 times

[470lm]

Do I upload them here, or onto the portal?

[Rseding91]

I was able to delete the mod erroring and load the save. After running it for 10 minutes I reproduced the issue and found it's caused by the mod https://mods.factorio.com/mod/configurable-nukes and faulty logic within the mod. It's creating a ton of references to the space platforms and never releasing them which causes some internal game logic that goes over references to the platform to take longer and longer.

Deleting the mod fixes the issue. Looking at the mod it seems to be making heavy use of caching (questionable at best, error prone/broken at current), and is doing several questionable things during on_load that are likely the causes of desyncs players seem to be experiencing with it.

[470lm]

I'll let the author know, thanks!