I started up the nether reactor. And left the game after. Once I ame back and wanted to get some more blocks from it. It was back the way it was right before I started the reactor. The obsidian had reappeared and all. (It turned to nether rack because I started it up in the same spot)
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Duplicate of MCPE-1217, please use the search function to see if your bug has already been submitted. Currently over 50% of tickets are being closed as duplicate.