My NIE expired and now I have to start the mortgage process from scratch

My NIE expired 4 months ago and the bank won't process my mortgage.

I've been working on this for 6 weeks, all documents submitted. Yesterday they call about the expired NIE. My gestor said it was for life but apparently old ones from 2019 do expire.

The Police station appointment is 3 weeks wait and the bank offer expires in 2 weeks.

Bank won't extend, so I have to restart everything with new NIE. Month and half wasted, plus Euribor went up. Some notaries accept expired NIE, others don't. The seller picks the notary so it's 100% pure luck.

And my lawyer says this is normal. How??

I'm going to lose the flat in Gracia at this rate.