According to description for June 1, 1580 (old calendar) in 'Nichinichiki' of Harutoyo KAJUJI, who was a noble and Buke Denso (imperial official in charge of communication with the shogunate), Nobunaga officially pointed out this problem even one day before his death.
武家伝奏であった公家の勧修寺晴豊の「日々記」の天正十年夏記六月一日によると、信長はこれを死の前日まで公に指摘していた。