Today, I noticed the segments of Trados Studio files checked or finalized by CT have the "released" status in Studio, not "translated."
My studio version is 2017.
If this is due to some spec change on the Studio side, it's OK. It is not a fatal bug.
I did finalization today, and it's okay. I may have done something unusual. Please forget about this post.
A straightforward solution might be to ensure that CT's "checked" status is Studio's "translated" status, whether or not the project is finalized.