A reminder about mattresses.

[Statyk]

The mattress is larger ingame than what it is in the level editor, so if you place it unscaled in a bed for example it will appear in the level editor as it if fits well, but ingame it will be too large for the bed and collide in a brutal way with it, making it freak out like crazy (either directly on load, or sometime during the game or when player gets near/touches it). So the solution would be to as you say either use static or scale the mattress so that it looks smaller in the level editor but is actually fitting like it should in game.

I have this similar issue with the "nice_bed" when scaling. I will scale it along the X axis in the level editor, but in game, it will scale in the Z-axis. as well as scaling the Z but the game scales it along the X. Y axis works fine though. Awkward, but it's no big deal. I'm just confused as to why/how it does this.