Huh..
Plant in ripening is actually better in as cold as up to 10c at that stage.
Helps with the fade process "most would say"
Its excess N.. your plant is in perfect ph And in its last push. It was seeking more of a PK ratio. And you kept with N. And that was intake, hence the clawing and reaction from your leafs that should be winding down now. Not getting invergorated by N.
Pull all nutes at this stage and I wouldn't even say no to a mild run off and see where your EC level is at. 3L of water per 30L pots ratio should do, so 1 / 30 pot size for small test of ec.
Good Growing