Favorite Son - S1-E6
Continuity mistake: When Dan confronts Mazikeen over leaving him in Chloe's apartment, he has his arms outstretched in the front shot and down by his side in the reverse shot. (00:21:20)
Favorite Son - S1-E6
Visible crew/equipment: When Linda and Lucifer are having a discussion at the end, a light screen is reflected in Linda's glasses. (00:39:10)
Favorite Son - S1-E6
Continuity mistake: Near the end, as Lucifer is bearing down on the biker asking who took his wings, the Biker stumbles and has both hands behind him. When the shot changes his left hand is raised. (00:33:40)
Favorite Son - S1-E6
Revealing mistake: When Lucifer is going through the forensics bag next to the dead body at the start, the body of the victim can be seen breathing. (00:07:30)
Favorite Son - S1-E6
Continuity mistake: At the start when the security guard is attacked, the number of papers thrown about changes from 5+ to 3. (00:02:40)
Favorite Son - S1-E6
Continuity mistake: The way Trixie grabs the chocolate cake differs from raising her hand up to Dan and just holding it out in another shot. (00:37:20)
Favorite Son - S1-E6
Continuity mistake: When Dan hands Trixie the chocolate cake, he holds it with 1 hand then two depending on the camera angles. (00:37:20)
Favorite Son - S1-E6
Revealing mistake: When Lucifer takes off in Chloe's car during the stakeout, tyre marks are visible in the gravel from previous takes. (00:32:10)
Favorite Son - S1-E6
Continuity mistake: When Lucifer is about to leave Linda's office she stops him and raises her hand in front of her chest. When the shot changes, her hands are not visible even though they should be. (00:17:40)
Favorite Son - S1-E6
Continuity mistake: When Lucifer meets with Chloe for the first time, Chloe has her arms by her side in one shot and on her hips in the next. (00:06:50)
Answer: Boo Normal and Once Upon a Time were going to be part of season 4, then the show got cancelled (before being picked up elsewhere). As such they were added on to the end of season three as "bonus" episodes, hence the continuity being off. But not really a mistake, just a quirk of broadcasting. Boo Normal was originally going to be between the episodes "High School Poppycock" and "Infernal Guinea Pig" in season 3 before being slated for season 4, presumably because aside from the point you've raised, it was fairly flexible, continuity-wise.
Jon Sandys ★