The Disney star was arrested Friday in Greene County, Ohio for disorderly conduct ... and the arrest report paints a pretty sad picture.

According to the police report, obtained by TMZ, cops say officers were conducting a welfare check after receiving a report a woman had passed out in the bushes on a residential street.

When police arrived, they say they found Irene in a nearby parking lot and she displayed a roller coaster of emotions ... one moment she's talking calmly with cops and the next she's upset and crying.

Cops say Irene was with another woman, Sheila, who told police the name of someone they could contact for Irene ... causing Irene to scream about not wanting that person to get involved. Officers say Irene then dashed away from them and almost knocked over a table on the sidewalk.

The report says Irene stopped running and calmly walked with cops for a moment, then suddenly became furious over a previous interaction with police.

Remember ... Irene was arrested twice over a three-day period back in November 2020, and police body cam shows her getting hostile with the officers who showed up to talk to her.

After things allegedly got heated this time, cops say Irene backed into a large window while yelling at the officers, who grabbed her by the wrist for fear she would shatter the glass, escorting her away.

Police say they confirmed Irene had no one to call to care for her, then told Irene she was under arrest ... and that's when cops say she tensed her arms and tried to pull out of one officer's grip, resulting in other officers restraining Irene with handcuffs.

The drama didn't end there ... cops say Irene became dead weight when they were taking her to the police car, so she had to be held up.

Irene was taken to Greene County Jail, where she was booked for disorderly conduct ... and we're told she was released from custody on Sunday.