Looks that `Delete All Emails` keyword does not work straight away about robotframework-imaplibrary HOT 2 OPEN

Get Payload From Multipart Email
    [Arguments]    ${subject}   ${timeout}
    ${LATEST} =    Wait For Email    timeout=${timeout}
    ...    subject=${subject}    status=UNSEEN
    ${parts} =    Walk Multipart Email    ${LATEST}

    :FOR    ${i}    IN RANGE    ${parts}
    \    Walk Multipart Email    ${LATEST}
    \    ${ctype} =    Get Multipart Content Type
    \    Continue For Loop If    '${ctype}' != 'text/html'
    \    ${payload} =    Get Multipart Payload    decode=True
    \    Exit For Loop
    Delete Email    ${LATEST}
    [Return]    ${payload}