No there were no consequence of Expiry once OINP sent me nomination but I sent 2-3 mails to OINP after 15 days of waiting period just as a evidence that I regularly followed up in case IRCC ask later.
after waiting for more than 6 weeks , finally i got response from OINP yesterday and nomination transferred to my new EE profile and got 600 points added today after accepting nomination
So whoever is in same situation, you will get response from province surely..all the best.
my friend , i had sent them mail thrice , called their number twice but honestly you wont get anything. I also had lost hope but OINP do respond sooner or later.
IMO , it is not harmful if you send them another inquiry after completion of waiting period of 15 days.
Mate , you cant do anything except wait hoping them to respond.