From CA FTB Publication 1031, page 6, Wages and Salaries:
"Wages and salaries have a source where the services are performed. Neither the location of the employer, where the payment is issued, nor your location when you receive payment affect the source of this income."
https://www.ftb.ca.gov/forms/2020/2020-1031-publication.pdf
The advice you've been given by @DavidD66 , @npierson7 , and @MaryK4 is correct. And your employer should NOT be withholding CA taxes from your pay.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
