The Easy A actress was arrested for drink driving earlier this month and was later seen texting while driving.
According to People, Bynes attracted attention again while on the road in West Hollywood on Sunday night.
"[She was] holding up traffic and doing an incredibly slow... three-point turn in the middle of Robertson [Blvd]," a witness told the publication.
"It was taking forever and she finally made it into the driveway. She looked wobbly - I guess it could have been the heels since she was wearing sky-high nude pumps, but she did seem out of it."
The 26-year-old also apparently failed to pay the $8 she owed to SUR bar and restaurant's valet and had to be 'chased down' to settle the tab.
Bynes's father Rick recently insisted that his daughter doesn't drink and blamed the officer on the scene for her arrest.
> Amanda Bynes 'drives away from police traffic stop'