Comment 6 for bug 1654351

That's right, the [Animations] list does not contain APOCEXP, and the game silently adds it when parsing AnimList= on ApocAP warhead. Ares expands the AnimList= tag to support more than 128 characters, but does not add the parsed values to the list like the game does. This can't be easily added back in, because the same function is used for 60 other tags. Generally it's bad style anyhow to silently add types like that, because every typo gets converted to a valid new type.

Check the debug.log file. It will mention if an animation couldn't be found when an AnimList= tag is parsed, then add those to the end of the [Animations] list.