Double clicking deletes a section?!

I cannot believe this is a feature. I’m sure I’m mistaken. Here’s what happens:
I have 20 sections, over 400 videos. I double-clicked the name to select it and edit it. The section disappeared! I was sure I just collapsed it or something. I tried again. And again. I just lost 60 lessons!

Please-please tell me this is not a feature that someone thought of and implemented. I cannot express my frustration enough for having to added tens of lessons from scratch.