The problem might be the arc mutex. mpsc are already clone, send and sync. When you clone an arc mutex T, you are cloning the arc. But mpsc probably needs to be cloned itself to work properly.

You don't need to arc-mutex an mpsc. On the sender side, clone the sender as many times as you need and pass it by value (each sender owns a clone). On the receiver side you must have only one (mpsc is multiple producer single consumer) which is owned by the receiver.

If you need multiple producers and multiple consumers I recommend this crate: https://crates.io/crates/async-channel

The same pattern applies. No arc, no mutex, just clone the sender and receiver handles for each producer and consumer respectively.

Don't worry about the cloning, channels are specifically designed to be used this way.