Trying to import MOD files with 4 channels created with OpenMPT, all organized correctly. Everything imports correctly in channels 1 through 3, except for channel 4. For whatever reason, everything but the notes themselves get imported, meaning I just have to manually copy the notes for channel 4 from one tracker to another. The instruments also just default to 1 as well. This is very annoying, as someone who primarily works by importing MOD files and then adjusting things on the tracker itself.
EDIT: Apparently this was an issue on my end this entire time, as the Import MOD option is only built with GBT MOD files instead of those edited by OpenMPT.