Hi Bro, sorry to say this but you a have a bastard worm digging actively your stem. What you see coming out of the hole is a chewed bolus. Hurry up!! First thing to do is to spray through the hole (with a long neddle) a solution of water/soluble sulphur/salt (or a synthetic pesticide in extreme cases) you have to spray generously with a such pressure. Then finish the bastard introducing a very thin metal wire (braided electric davo) to prick and kill the worm deeply. They belong to Cossus Cossus" family, you can use also nematodes like "Neoaplectana carpocapsae" or
"Neoaplectana feltiae". C'on Bro👊👊