I've got an issue where the extruders actually heating up is severely lagging behind the input for heat upon warm up. I don't have any issues once the machine is up to temp and running.

I've got the standard Flashforge Creator dual head and I just upgraded the firmware last night to Sailfish v7.5 via Replicator G which had a note that it addressed extruder lag. I've also only operated via USB so far.

If I use the control panel, I do see the commands for temperature and the bed heats up, but the extruders just have a massive delay until one starts heating up, then the other gets going. I also seemed to notice, maybe a coincidence that as soon as the fan's turn on, the last extruder to be lagging starts going.

Is there a deeper diagnostic tool I can use to try to sort out where the problem is, like seeing if the board is actually making the command for the heaters to turn on?