Was Mackenzie Phillips fired from One Day at a Time?
offtopic:I know Dana Plato was fired from Diff’rent Strokes.
She was later let back after her pregnancy. Was Mackenzie fired and let back?
Due to substance issues.

Yes, Mackenzie Phillips was fired and then rehired and then eventually fired again.

People Magazine says Mackenzie got fired

https://i.ebayimg.com/images/g/wj0AAOSwEy1eIrU9/s-l400.jpg

She was fired for drug use.

If it ever was a secret it certainly isn't anymore.

I give Norman Lear credit for allowing his producers to stand up for principle.