I have tried this on three different computers, from simple Realtek sound cards to a fancy Creative one, the bug persists:
Whenever, I placed a sound placeable in a new module, in a new or existing area,
OR whenever, I edited a sound placeable in an existing module, mine or someone else's,
I get a big error window, complaining that I have to have 2D-sound WAVs and not 3D-ones (since these are for playing continuously). After the error window has popped up, the toolset decides to erase the .wav files that were included in the sound placeable from the blueprint palette. This means that the sound cannot be placed or played.
This is quite annoying. What am I doing wrong?
I have tried with like 25 different kinds of sound placeables - each and everyon hickup this way.