The input of this function can only be decoded sometimes, although the input and the function are not changed?

Smart Contracts
,
1

I am using Remix with compiler 0.8.9. In the following codes, if contract BBB is deployed, using function aasenderaddr() in BBB with two addresses as function input would result in a "decoded input -" in the console.

However, delete any variable or the other function in the BBB, (or add a third function input), then use aasenderaddr() with two addresses input (or with the third function input) again, the console would decode the input without problems. Why?

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract Logstuff {
    function senderaddr() public view returns (address) {
        return msg.sender;
    }
}
contract AAA {

    function asenderaddr(address _contract) public returns (bytes memory) {
        (bool success, bytes memory data) = _contract.delegatecall(
            abi.encodeWithSignature("senderaddr()")
        );
        return data;
    }
    
}
contract BBB {
    uint public num;
    address public sender;

    function aasenderaddr(address _contract, address _contract2) public returns (bytes memory) {
        (bool success, bytes memory data) = _contract.delegatecall(
            abi.encodeWithSignature("asenderaddr()", _contract2)
        );
        return data;
    }
    
    function basenderaddr(address _contract, address _contract2) public returns (bytes memory) {
        (bool success, bytes memory data) = _contract.call(
            abi.encodeWithSignature("asenderaddr()", _contract2)
        );
        return data;
    }

}