When the Ender Dragon is killed by TNT following the death of the last player in The End, the dragon glitched and did not drop any experience.

Configuration:

• Xbox One (original edition), with stock controller, connected to WiFi with "Open" NAT
• Motorolla Surfboard SB5101U cable modem, Comcast/Xfinity cable internet, apartment dwelling
• Buffalo WZR-1750DHPD DD-WRT WiFi router
• Cold boot of Xbox, modem, router
• "Realms 6 Month Subscription: You + 10 Friends" verified via https://account.microsoft.com/billing/orders
• "Canceled subscriptions | Gold – 12 Month" verified via https://account.microsoft.com/services/
• Xbox Live Party Chat active with one or more persons, myself using a stock headset, audio activity cues displayed on-screen
• One or more players in the realm, one player fighting the Ender Dragon
• HDMI video only, no speakers or audio
• Random-seed realm, Survival Mode, Easy difficulty
• No other non-default realm settings
• Several imported old worlds from Minecraft Xbox One Edition\

What Happened:

• One player fighting the Ender Dragon, one player in the overworld
• Ender Dragon health is reduced to ~25% via Power IV + Flame arrows
• Several TNT are placed and ignited on the bedrock-block altar at the center of The End, just as the dragon hovers over it
• Player fighting the dragon is immediately killed by an Enderman
• Upon respawn, same player re-enters The End and notices the following
  • The dragon has glitched into one of the obsidian End Crystal pillars, flapping wildly
  • The dragon flashes red when hit, but only once, and does not register a hit after that, and does not die or disappear
  • The return portal has activated and functions normally, with credits
  • The dragon egg case has spawned on the bedrock-block altar
  • No experience has been dropped
• Upon re-entering The End a second time, the dragon has disappeared