Maybe the air bubbles in your mousse are too large? Maybe the detailed parts weren't completely filled? Or maybe it got too cold after 2+ days that the mousse became brittle?
Air is usually the most common problem I have with unmoulding a Pavoflex. A mixture like carrot mousse that isn't quite homogenized gives me the most trouble. Filling the mould too fast leaving air pockets in the detailed parts is another common problem.
I don't have that particular shape so I don't know if maybe the shape you bought is inherently more difficult to unmould?
Air is usually the most common problem I have with unmoulding a Pavoflex. A mixture like carrot mousse that isn't quite homogenized gives me the most trouble. Filling the mould too fast leaving air pockets in the detailed parts is another common problem.
I don't have that particular shape so I don't know if maybe the shape you bought is inherently more difficult to unmould?