After the Nether Update, any treasure map discovered is the same one. I've tested this on 4 different seeds and up to 10,000 blocks away - it is the same map. I've discovered unlisted burried treasures as well and realized the locator maps say "unknown map" when they're put into a chest.
PLEASE fix this! I love getting treasure maps and exploring!
Thank you for your report!
We're actually already tracking this issue at MCPE-80127, so I will resolve and link this ticket as a duplicate.
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