Stepcompress / invalide sequence error on specific model

Yes I do. But the sock does not seem to help when those 2 blowers blow at 80%.

See attached temperature graph, where I tested this by setting extruder temp to 240C, then switched fans to 80%. This means that those fans are blowing away 40W of heat (wow):

If I let this run, klippy will eventuall panic and stop.