Samourai still functions in 2025? I thought they lost and closed down? I don't hrsr about them anymore since I lost some Bitcoin using their service, I was still very new to Bitcoin at the time and I sent some Bitcoin to an address but instead this wallet sent gas fee to the wallet address and kept the $200 as the main gas fee, this was how I lost everything.
Samurai whirlpool coordinator and website has been taken down, anything related to their service is shutdown. I will not advice anyone to use service like samurai for now, the government has put them on watch list, it's better to use other coinjoin protocols or mixers. That been said.
Another thing I will like to draw to your attention is Bitcoin transaction fee is not the same thing as gas fee, the term has fee is associated with Ethereum, there is nothing as such with Bitcoin. You can either use fee or transaction fee and not gas fee.
I was using Electrum too so It was not my first time sending Bitcoin, how and why they use my balance as gas fee and credited the address with small tinny Bitcoin is unexplained till this day.
I've seen news online where people use 10 BTC to send half BTC, how and why they make such mistake remains a misery for me, maybe someone can explain to me why this happened.
Are you sure that is not change address you were given because as far as I know about whirlpool, your output must be uniform unless you are using coinjoin and it's rare for you to receive an output that is smaller than what you gave them. Even if you pay fees, I don't really think that your output should be that small.
There is no way your coin can be stolen. You get what you put, it's either you get less of what you put after deduction of the fee or you get your output (after fee deduction) and a change.
The only way this can happen is perhap coin mixers, this can't happen in coinjoin or whirlpool unless if you are the one that made mistake and deposited less and use the remaining sats to pay fees, you paid more than what was required and everything went to the miners.