Cities: Skylines (Steam) - Population randomly jumping by 1 million before falling back down

[Sobody]

Describe your issue
Population randomly jumping by 1 million before falling back down

What is your game version?
1.14.0-f4

What expansions do you have installed?
Snowfall, Mass Transit, Parklife

What mods are you using?
Simulation & building related:

Remove need for power lines
building themes
pollution solution
advanced building level control
lifecycle rebalance revisited
more effective transfer manager
adjustable business consumption 2
power storage
optimise outside connections
81 Tiles (fixed for 1.2+)
ploppable RICO revisited
TME stable
total autobudget
real time
night time solar power


Other:

toggle edge scrolling
more network stuff
prefab hook
ambient sounds tuner 2.0
loading screen mod temporary fix for airports dlc
tram station track
loading order mod v1.2.2-beta
upgrade untouchable: convert stations
hide it, bobby!
prop anarchy 0.7.5
bob, the tree and prop replacer 0.9
tree anarchy 1.3.5
extended managers library 1.0.3
more city statistics
curb height adjuster
adaptive networks
save my ears
compatibility report
parking lot snapping
smart intersection builder
roundabout builder
left-hand network fix
network multitool 1.2
tiny segments - extra anarchy
custom animation loader
unifiedUI
procedural objects
commuter destination
zoning adjuster 1.5
harmony 2.0.4-4
yet another toolbar
EYM: enlighten your mouse
better road toolbar
building spawn points 1.2.3
rotterdam: road texture terrain edge remover
node controller renewal 3.1.3
net missing recoverer (disabled)
smarter firefighters: improved AI
modernTramSoundAddON
extra vehicle effects
vehicles effects 1.9.1
continutes junction median V2
breakdown
ron, the network replacer
theme decals
no problem notifications
postprocessFX v1.9.0
sharp textures
less steam
mesh info
network skins
SingleTrainTrackAI
the original hide policy icons
toggle it!
extra landscaping tools
find it! 2
move it
advanced stop selection
one-way train tracks
extra train station tracks
hide TMPE crosswalks v3.0
building theme:japanese low residential theme
road options (road colors changer ++)
automatic bulldoze v3
advanced vehicles options
fine road anarchy 2.0.2
find road tool 2.0.4
intersection marking tool 1.8.2
broken nodes detector
picker
hide TMPE unconnected tracks
FPS booster
patch loader mod
custom effect loader
showdow strength adjuster
ultimate eyecandy v1.5.2
railway replacer
transport lines mangaer 14.3
unlock public transport
quay anarchy
network tiling
extended toolbar
not so unique buildings
mod achievement enabler

Please explain your issue is in as much detail as possible.
So I have a very strange issue that I cannot find has been experienced by anyone else in my searching. Randomly (every 3 to 5 real minutes) the population of my city will increase by 1 million, before decaying back to the real population over about 2 minnutes. This does not seem to create cims that run around, but the electricity, water and heating demand spike proportionally so it is impossible to keep up, and autobudget attempting to makes me bankrupt (infinite money, but still).

I am modded as you might expect, and I've checked all the possibly suspicious mods for incompatibilities or this issue but can't find any, including with compatibility report. This started happening randomly one day when I started the game - no new mods, one new asset (that I've since removed to no avail), and no game update I don't think, so this is very strange.

The problem save has a population of ~100k. The issue began immediately upon loading not after running for a while, so I doubt it is a population threshold issue for the optimal population for real time to function properly, but it may be possible. This issue does not occur with a new city of 200 left to run for a while.

There are no messages in the debug log or reported issues with compatibility report, so I'm at a loss of where to start troubleshooting aside from unsubbing from mods one by one, which as you can imagine would be a terrible time. Perhaps we can identify a suspicious mod, or there's a different log I can check?

Can you replicate the issue? If yes, please explain how you did it.
Load the save.

Attachments File(s) attached

 

[AndrewT]

Please check your mods against this list:

[Cities Skylines] Broken & Incompatible Mods - Patch 1.17.1-f4

Broken Cities Skylines | List of Broken mods These mods are all broken, dead, or not compatible with the current version of the game. Please read the 'Issue' column before making assumptions! If there is a replacement, it's listed in the green row under Replacement. Links provided for quick uns...

docs.google.com

If you still get this problem after removing or replacing any bad ones, attach here the game's log file:
...\Steam\steamapps\common\Cities_Skylines\Cities_Data\output_log.txt



Good luck!

 

[Sobody]

If you still get this problem after removing or replacing any bad ones, attach here the game's log file:
...\Steam\steamapps\common\Cities_Skylines\Cities_Data\output_log.txt

I've checked the list, no issues. Here is the log file; I had a quick scan, maybe I should consider removing continue junction medians in general, but I didn't see anything specific to the population spikes. This log was created after letting the population spike twice with simulation running.

 

[UptownJones]

I am experiencing an identical issue to the one you have described, did you end up finding a solution?

 

[Sobody]

I am experiencing an identical issue to the one you have described, did you end up finding a solution?

Unfortunately not. I haven't played too much since, but when I have I've just dealt with it; fortunately the save is still playable. It brings me some relief to know that at least one other person has experienced this XD

Out of curiosity, do you have a similar list of simulation mods?

 

[행주해주]

Has anyone solved it? I have the same problem