Hey Michail. No. It's like what I said. I had 1 address in my CoPay wallet.
I send 0.001 from it. But what CoPay did: It sent the 0.001 + 0.05 to a new adress which contains now to my wallet.
The 0.05 are still mine. But now I don't know how to get the 0.05 back to my big address.
Which is what I said. Change address.
But, without seeing the transaction ID, it's hard to explain/guess. You're welcome to message me directly to work through this, but asking in a forum without any information is simply going to get a lot of guessing done. What you think and what I think are simply guesswork until we're both looking at the same thing.