I have produced cutting while in flowering stage- decided I wanted to try to keep a mother after flowering- what I did is not scientific but it worked.

I actually gave a FULL dose of nitrogen while in full flower- then 7 days later took a cutting from the lower growth - it struggled a little but did fine….the struggle was similar to when the cuttings are a little cold - it rooted a little slower ( about 7 days before seeing the nodes where the roots come from) and then about 14 til I had viable enough roots to put in soil.

Not sure if this is a sure fire way- but it worked for me….