In windowed mode for me all gui scales work fine other than small which cuts off the top. In fullscreen (4k) auto is the only resolution where the majority of the model are not cut off.
https://i.imgur.com/WziMmGP.jpg all gui scales where it fails still render part of the multiblock, unlike #103
Using https://minecraft.curseforge.com/projects/dragonbox modpack, 0.2.1

Yes. Don't use Auto, it has issues with GUI scaling in many mods. There isn't really a good way around that.

Ah sorry I misstated that, auto is the only gui scale that never has this issue for me. Small never works, and normal/large don't work at full window size. Really strange that the most problematic gui scale is the only one consistently working properly here.

Tested this on 1920x1080, large and auto work fine at that size while normal and small have the same problem. There doesn't seem to be any difference in where the model is being cut off in the gui from what I can tell; all window sizes and gui scales have the model being cut off in what looks like the same point.