Lags/stutters in multiplayer

[Babybluevalo]

Hey, me and my buddies are experiecing issues using imperium in multiplayer

Our setup:
I am the host and I have Imperium installed
Another player also has Imperium installed
One player does not have Imperium

The issue only happens when Imperium is enabled. When we disable Imperium, the game works normally.
I (host) work perfectly fine for my friends. My character does not lag or freeze from their perspective. However, the other players start stuttering/freezing for each other and for me. Their movement freezes, and their voice chat also freezes at the same time, which makes it look like a networking/desync issue rather than an FPS issue.

This happens immediately after creating and joining the lobby. Is there anyway to fix it or is it a common bug? Imperium worked fine for us in late 2025 in the other version of the game.

We are using imperium as filmmaking tool. Some features are necessary for us and with that lags/stutters/desyncs it is impossible to record.

Log file:
log file.txt

[ratijas]

Depends on a hardware, I guess. I've never experienced such issues, but I've got a decently powerful laptop.

Imperium is a little hard on resources. Some features are running every frame; and some things perform full heap scan & sync every second.

However, from a quick look at your logs, I noticed you are also running DawnLib, LLL and a bunch of other content mods. So I'll have to ask: can you reproduce the issue on a clean modpack with Imperium (and only its dependencies) alone?

[Babybluevalo]

We tested it today using a new modpack with only Imperium and its dependencies, and it worked perfectly fine.
We also tested our normal modpack that we use for filming, and strangely enough, the issue disappeared by itself. No lags, no stutters, everything was working normally.
The strange thing is that we had this exact issue on two separate occasions before, and then it suddenly started working again without any major changes.
By the way, is there any way to disable or reduce the more technical features, such as the full heap scans or automatic synchronization? We mainly use Imperium for filmmaking (freezing time, spawning objects, changing weather, credits, etc), so we don't really need all of the heavier debugging features running all the time.