First unemployment deposit is late, what should I check?

I filed my claim 18 weeks ago after being let go as an HR coordinator. I have read a lot of threads here and could not find my exact situation. I answered every question and uploaded my final pay stub. What would you check first?

Keep certifying every week even while you wait. If they find you eligible, the weeks you certified are the ones that count.

When I finally got through, the agent said my employer had responded late. Once that cleared, back pay came in one payment.