A slightly less obvious bug.
If you tell Cefca hides (either automatically or manually) and then tell him to come out, once you get to his command list, the cursor can highlight the 5th blank command slot. When it is selected, Cefca becomes completely useless and his command won't come back up.
A related question...
You intentionally used the Pray version for Rosa the first time.. and when she comes back, she uses the lame Cure potion version?