We are aware of lag spikes on Omnifactory and are working on resolving them.
They seem to be chunkloading related. On some occasions, when a player logs off, their base doesn't get properly unloaded or rapidly un- and reloaded, which results in large lag spikes. We are trying to track down reasons for that, which requires some timing since the issue isn't constant and a staff member needs to have time when the issue arises.
We are positive that we will be able to track down the causes or at least provide a workaround to stop these issues from happening.