Thanks for all the updates. Much appreciated !
For the information, I updated the plugin. I previously used the February 21th C3 plug-in, and some of SCML objects don't appear anymore. I didn't change anything in the project, didn't reimport from Spriter or did anything special.
Here is a capture of the SCML object info:
I tested on the web-based C3 and on the desktop build, and both aren't working.
I reverted to the previous plugin I was using and everything is working fine again.
Any idea of what could be the problem?
[EDIT] as explained below, the problem seem to come from SCML families. Removing the object from the family make it appear normally.