Saw this in the SideSwap telegram channel from the SideSwap Team.
“The UTXOs you receive when conducting your peg-out will differ from the ones you pegged in. The UTXOs are auto-selected and do not depend on what UTXOs you pegged in. The network couldn't track any relationships between the two.”
If Samurai Or Wasbi isn’t your thing use your UTXOs to peg in and out of SideSwap: