Hello. First time poster but long time lurker. This might be a noob question... By 'Large Transaction' I mean large number of inputs and outputs.

I'm looking into Wasabi CoinJoins on Blockchain explorers and there's something I don't understand: There is a slight difference between, on one hand the total btc input minus the total btc output, and on the other hand, the displayed miner fee.

For example in this transaction: https://blockchair.com/bitcoin/transaction/e9abc669f19439f7f738e26516106d74ddfc8ff761ce6e718dc9479392a05dfb

The displayed total input is 81.26491943, total output is 81.26462135, and miner's fee is 0.00029808. But if I click on the 'Raw transaction' button and add up all outputs from the JSON code, I get a total of 81.26462131. There's a 4 satoshis difference.

The transaction is displayed the same way on a few blockchain explorers. I also saw the same problem with other large transactions.

Where is the problem? Thanks.