Inconsistent idle for 2013 honda crv

What is your question?

Upon start up, during idle, the rpms go from 1500 to 1000 and back and forth anywhere in between. Once warmed up it stays around 1100 but jumps down to high 900s just below 1,000 and back up again. No pattern and may be nothing major just never seen a vehicle with such an irregular idle this much. My TSX starts around 1500 and slowly goes down and has the back and forth between 1100 and 1000 but definitely more noticable in the crv. Funny part is their the exact same engine. And that's what made me notice it.

What makes this problem better or worse?

Cold engine

How long has your 2013 Honda CR-V had this problem?

Few days