I appear to be losing information in some animations when converting from json to skel on the command line.
On my current project, we do postprocessing on spine json to split skins into separate files and have a shared file for animations.
Because the cost/allocation of parsing the json is too large, we then convert to binary. This appears to break some animations, though. Some fields in the animations that had names of "Eye_L_Blink_FULL" are turned to null if I convert it back to json (and this matches the in-game behavior).
I have attached the export configs and logs from my tests. I can provide the skeleton json privately if needed.