Umm, that is the behavior I would expect, according to the patch notes the change to carriers just removed their Nuclear Explosion immunity, it did nothing to the "spawn contents on death" logic so killing the Carrier with a nuke is effectively the same as killing it via fire from your fleet.
The last time I faced a flood of carriers I ran into this using Lighting Warhead spam. Was quite a surprise to pop 6 carriers and get a Golem to the face.
D.