No sample playback (Loop/Slice)

When editing a (long) sample in loop/slice mode, and isolating for example a snare or horns hit, this slice (not saved as a new slice) won’t be played back the next time I load the pattern or project. I’ll just get a “clicky” sound.
I tried to save the new slice as a new sample, but even after that the playback problem remains, just a clicky sound. When playing the pad manually, the sample plays correctly.