The heat probably got ya on that one, but usually, the cause and remedy is in prep and gluing practices.
Create nice gradual dips/fades, mate the pieces perfectly, surface prep them with a toothing plane blade, glue them with Smooth On cured with a little heat, and forget about it. No pedestals, no power lams, no sacrifice of working limb length. Done as described, you can let them bend into the glue joint some if ya like. They're not going anywhere.