My thoughts exactly. High humidity and temps outside can wreck havoc with a rattlecan. Did you spray outside? Primer wouldn't be a factor for the bubbling/orange peel.

We get humidity in NY during summer months. If I need to spray outside with a rattlecan, I'll do it early morning or wait til it cools down at night; if possible.

My advice would be spray in several light coats instead of two - at least four would have been suffice if possible. Maybe three at best.