I copied the address from Bhc address from Coinbase, pasted to blockchain.info and clicked send
It is possible that you accidentally copied a Bitcoin address instead of BCH. Coinbase uses p2sh Segwit addresses for Bitcoin and the address you sent to is also p2sh. When converted to legacy format the address is 3L8yHKLYoFJYSjj6XVwYpDJ5upHV8giwnp. You might want to check if that matches one of your BTC addresses on Coinbase.
that is possible what happened to OP, unconsciously copied and pasted a BTC address
@OP can you check whether 3L8yH... is one of your BTC receiving addresses on coinbase?
or might as well contact coinbase support and ask whether BTC address 3L8yH... belongs to them
and explain to them you may have mistakenly sent BCH to your coinbase's BTC deposit address