After i updated to minecraft 1.14.4 i decided to delete my old Surival map and a start a new one, but to my suprise after playing for some time in this map and finally enter the end portal to fight the ender dragon for the first time, i see a cobblestone bridge (that could not have been built by me on this world, since i just completed the end portal) with a few torches on it. It became obvious to me that something was wrong when i noticed that there was no ender dragon, and all the obsidian pillars had stone that i used as scafolding to reach the crystals in my old save. At this moment i just wished the problem was only in the main island, but as i reached my first ender castle i noticed that it had already been raided (by me in the deleted survival map) meaning that was only 1 shulker alive, lots of holes that i made to fight  the other ones and blocks that didnt belong to the end, and also no loot in any of the chests (only items like seeds and horsearmor that i never take with me). Not sure what caused it since there was no evidence of any bug before entering the End.