Vehicles judder when driving

[Mr-P1nky]

When the mod is active (on a g portal server) all vehicles judder when driving, speed seems to jump down by approx 5mph whilst the gearbox jumps between drive and reverse. Deactivation the mod stops this behaviour. Doesn't not affect walking or teleport. Server ping was low (approx 25ms)

[Bl4ckS4ils]

Yes, I can confirm that when you drive it with a vehicle, it slowly starts to stutter, and after some time the problem gets worse until the game freezes. This all happens in multiplayer, specifically on a GPortal server. I also noticed that on the map, the ground textures are blurry (individual square patches).

[Ozz-Modding]

I believe the textures is a thing with the new game patch. Can you please be more specific about what you’re doing in game when this happens? Does it stop when you stop driving? Is it the modhub version or the latest here?

[skeletonwburg]

Same problem here with the ModHub version. We tested it a bit further and it happens when we started mowing grass. Once there was grass mowed on the map, the game had some networking warnings in the log. The Warnings don't appear immediately but instead in bursts.
On server side:

Warning: Send called with unknown target address

while this happens on client side:

Warning: Could not decrypt received packet.

I also picked up this error on client side, maybe it's related. I haven't looked into the code:

2026-03-20 19:50:34.787 Error: Running LUA method 'packetReceived'.
G:/Documents/My Games/FarmingSimulator2025/mods/FS25_MoistureSystem/src/main.lua:845: table index is nil

I just saw that there was a commit for mp issue fixes. I will test that.

I tested again with the current version from GitHub and the issue persists.

[officixltimo-tech]

The same happen to me aslong the in game time is running i have frame stuttering as soon i set the time to 0.0 it stops i only have this when the mod is enabled it started to happen when i mowed my 5th field of grass so i guess it is to much grass for the game but the field size from the grass fields are all together roundabout 20 hectares here a gameplay clip for you: https://medal.tv/games/farming-simulator-25/clips/mm8W1UjtaNNNnStga?invite=cr-MSxYTU0sNDQyMDMxMDg3&v=132 edit: i collected all my grass and the frame stuttering is gone

[le-Vinyl]

Stimmt. Wir haben den Fehler „Warning: Could not decrypt received packet“ und alles ruckelt extrem (nicht spielbar!).
Wenn man jedoch die Zeit stoppt, ist alles wieder normal – allerdings trocknet dann auch nichts.

Ich glaube, diesen Fehler hatte der andere Wetter-Mod auch und hat deswegen die Karte in kleine Felder eingeteilt.

....

That's correct. We are getting the error "Warning: Could not decrypt received packet" and everything is extremely laggy (unplayable!).
However, when you pause time, everything returns to normal – but nothing dries then.

I think the other weather mod had this issue as well and therefore divided the map into small fields.

[Ozz-Modding]

Network comms errors like this commonly cause lag, it doesn’t necessarily follow that performance is inherently bad. I saw this with some early errors I had with Red Tape.

If anyone can share full client and server logs it will help me track this down. It’s going to be a few days before I can really deal with this I’m afraid.

[gustavojpa20]

here i'm with the same issue. but in the log of the server don't show the error, but in my log it's appear. i'll send the 2 logs for examination.

log_2026-03-22_12-17-50 SERVER.txt
log_2026-03-22_12-20-15 PC LOG.txt

[Mr-P1nky]

i Am also seeing alot of "2026-03-17 22:43:10.394 Warning: Could not decrypt received packet." in my game log when i have the mod active, it doesnt appear in the server logs. once the mod is deactivated the warning does not appear. Hope that helps diagnose it.

[skeletonwburg]

I've tested again, without other mods, just the Highlands Fishing DLC and MoistureSystem (latest version from GitHub).

I started a fresh savegame, bought a mower, drove to the next grassland and started mowing. Right after the first mowed grass appeared on the ground, the game started to feel sluggish. After less than 5 minutes the first packet received warnings in the client log appeared.
Server log was empty this time.
Here are both log files:

Client log.txt

Server: log_2026-03-24_15-38-01.txt

I truncated the client log after 16000 rows, because it was initially 50 Mb large after a few minutes playtime.

[Ozz-Modding]

I'm having a hard time replicating this honestly. I have a server with highlands dlc on, I can mow and harvest and bale and I don't see these logs at all. I need to ask around a bit to see if anyone knows the meaning.

[officixltimo-tech]

Yes but the same problem without packet things are happening in singleplayer as well

[Ozz-Modding]

That may or may not be a separate issue then. I've been playing for months and never encountered it, so there is some oddity involved. If you have it in single player, please provide a log.txt of when it happens.

[Ozz-Modding]

I've tested again, without other mods, just the Highlands Fishing DLC and MoistureSystem (latest version from GitHub).

I started a fresh savegame, bought a mower, drove to the next grassland and started mowing. Right after the first mowed grass appeared on the ground, the game started to feel sluggish. After less than 5 minutes the first packet received warnings in the client log appeared. Server log was empty this time. Here are both log files:

Client log.txt

Server: log_2026-03-24_15-38-01.txt

I truncated the client log after 16000 rows, because it was initially 50 Mb large after a few minutes playtime.

Are you able to try this with a base game map to see if its DLC specific?

[Mr-P1nky]

FYI, when I see the issue on my server it's on the saxlingham map, haven't tried a base game map though

[officixltimo-tech]

That may or may not be a separate issue then. I've been playing for months and never encountered it, so there is some oddity involved. If you have it in single player, please provide a log.txt of when it happens.

The Log is clean but when it happen again i provide the log.txt