Chickassan
RIP 1975-2022
Could be misplaced daddy issues too. My pol pullet still tries to squeeze under the elders like she did as a chick. 

Funny stuff...but...if she wanted to be mated she would squat down in front of them.
Crawling under another bird is usually 'fear' or 'distress' and she's trying to 'hide'.
....to continue the funny...she's got PMS(hormone surges) and is just nuts.