I flush/flushed my plants but only after I considered them ripe, the notion of starving them at any point isn't the case and never has been for me.
I'm reconsidering flushing for future but that's another story.
Years ago I read that was the done thing so I've done it since, I commented recently about testers never tasting bitter or chemically etc hence reconsidering the whole business, I've got some near ready I'll try it but I suspect I know what the outcome will be.
I've tasted some crap, bitter, nippy, soap like, course as fk!
I thought the lack of flushing caused that, we live and learn though it's part of the fun.