End Crystal Towers stuck in Regeneration Mode

My friends and I have a Realm server hosted by a separate Xbox user. While playing alone (as TheSmokeEaters), I spawned the End Dragon for about the fifth or sixth time (previous times were successful without a bug). Spawning the dragon stage worked normally with each tower resetting with an End Crystal atop and a light beam in the sky. I aimed a bow and arrow at one of the lower Obsidian towers in anticipation of destroying the End Crystal as soon as the stage ended. I shot the tower right when I thought the stage was about to end, only for the arrow to bounce off harmlessly from the End Crystal (as it would anyways during this regeneration stage), only, the tower did not stop its light animation.

Furthermore, when the stage ended to start destroying the End Crystals on the towers and fight the End Dragon, three End Crystals on the towers (including the one shot and two towers beside the described tower) were kept in the regeneration mode (with the light beam animation towards the sky illuminating them constantly). These cannot be destroyed by ranged weapons or by hitting them. They have a beam of light coming out of them, and the End Dragon will keep its health. I cannot kill the dragon as these towers cannot be destroyed, and thus cannot exit the End without teleporting to someone or dying.

In an attempt to fix this, I died multiple times in various ways to get out of the end. When I re-entered the End, the problem stilled occurred. On my end, I exited the server and re-entered, reset the Minecraft game, hard reset the Xbox all to no avail. Although I was able to recover the items that I was going to use originally during the fight (by making an End Chest and storing the items while in the End), I cannot successfully kill the dragon and don't know if there is a way to reset the End on our Realm server.

I was directed from the Minecraft Help Center to here for my inquiry. Any and all help would be appreciated. Thank you.