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The way that the heaters turn on and off is by using a gcode command. So my first thought is that somehow the new slicing profile is not spitting out those commands. Try comparing the generated gcode from slicing the same model in both versions and see what’s different. The temperature commands have to be at the start so should be easy to find. The gcode commands themselves are very googleable.
Look at the start G-code of your configured printer. Copy over the one from the old version into the new version.
The start gcode of the old version and new version are identical.
The gcode command should be either
m104 e0 160Sets the first extrider to 160, doesn’t wait
Or
M109 e0 190sets the first extruder to 190, waits to reach temp before moving on,
I would consider checking with a usb connection and setting the hot end temp manually that way, if that works, it’s something in the gcode, and you can pull up a gcode reader (or text file,) and search for them.
Is there an easy way to compare .x3g gcode files? It seems to be in binary format, rather than plaintext. Alternatively, is there a way to capture the slicer output gcode before it is translated to x3g?
Wtf is that format and why would anyone use it. I guess it's compressed. That would be the only reason to have a binary format for this.
Also the who writes the x3g file? Is it cura directly?
I think x3g is the required format for all printers running Sailfish firmware, such as my FlashForge printer. I'd be hesitant to change the firmware, as I don't want to risk bricking my printer if I do the wrong thing.
Cura writes the files using the X3GWriter plugin by Ghostkeeper. Perhaps there is a way to turn off this plugin and compare the gcode?
I'm sure there must be a way to temporarily change Cura's settings to export G-code instead of x3g. Did you figure this out yet?