At this point, I don't remember if I was using Halide from the lock screen or not, but I lost tons of photos because apparently I turned the screen off before the photo finished saving to the library. Halide forgot about it, and even after reopening the app, it was gone forever. This would only seem to happen when I turned the screen off quickly after taking the photo.

These days, I use the regular Camera app because I need my damn photos to save. I loved Halide, but that bug made it too unreliable. I get very distressed by data loss and couldn't continue to risk it while trying to develop a way to work around it.