Cartoon Network shows full ending credits to their shows on very rare occasions. The most recent example I can think of was right after they aired the season finale of Ben 10 Ultimate Alien, the credits weren't squished/voiced-over.
But it's so infrequent that, when it does happen, it's probably not on purpose and is more likely a glitch on their end (CN is the king of on-air glitches, after all).