This is a bug I found this morning. Thought I did something wrong in the last month but figured out it was actually a bug just now.
I thought I was selecting a wrong compressor option for it to not show up, but the Neutron Compressor option does not show up for me to select as a side chain option for another track sometimes, and the list of options for other compressors on other tracks do not show up at all unless I duplicate the midi track and I have to disable the original tracks after I clone them and then hide them.
This is a big hassle and is highly unprofessional from a DAW. Had I known this, I would've saved up for Ableton instead.
Now for producing tracks I have to worry whether or not I'm selecting correct sidechaining options because the whole thing is so buggy, I find it highly unreliable. What's the deal??????
COME ON STUDIO ONE. WTF? You just released an update this morning and you DID NOT THINK TO FIX THIS FEATURE?
FOR PROPER SIDE CHAINING OPTIONS TO UPDATE AND SHOW ITSELF UNDER:
SENDS > SIDECHAINS