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You are one of two people to report this so far. I'm going to suspect one of three things happened. Latest update either has a bug, calculates rated miles differently, or unlocks more KW. Would be a nice 4th of July surprise as long as it's not a bug. A test trip past 250 miles would be nice to confirm.
What firmware version are you on? Do you have the word "ideal" underneath your battery on the app? Can you share a screenshot from the app home screen?