`declare -f` doesn't work properly with some function defs

[SleepyMug]

declare -f does not produce a function that is syntactically correct if it has a particular usage of heredoc and &&.
Example:

a() {
    echo hi &&
    cat >/dev/null <<-EOF &&
    texttexttext
EOF
    echo bye
}

with declare -f the definition will become

a () 
{ 
    echo hi && cat > /dev/null <<-EOF
    texttexttext
EOF
 && echo bye
}

which will trigger a syntax error if parsed as shell script (notice the change of position of &&).

It seems that the first command and the third command are necessary for this behavior.