using left extruder only makes right extruder heat up at layer 1

[avxmw]

First I'd like to say thanks for making this possible, other than my Linux Flatpak version of PrusaSlicer not playing nice and I need to call the script by hand, it works fine. Thanks.

However, one bug as stated in the title: when printing and settings temps just for the left extruder, the layer change from 0 to 1 sets the temp for both extruders as the T1 is omitted at this point.

Not sure if the way to fix this is in to be done in the post-process script or somewhere else. Not sure if important, but PS version 2.6.1 here.