I claim to know John pretty well. I offer as exhibit A excerpts from a lighthearted exchange of emails yesterday:
John sent a turn Saturday morning with this note: "Have the day off so I can do another during the day without issue."
Dan's reply: "'Can do another....without issue' generally means no turn.

'...can do another...without issue' usually means 'Things will come up and you won't hear from me again until Sunday afternoon sometime.' After playing together so long, we know each other pretty well. 'Without issue' almost 100% of the time turns into long, long gaps without word as to what's going on.
John: "Now--Now. My exact quote was “'I can do another during the day without issue.'”
I sent the turn to him around 2 p.m. my time, noon his time.
He sent the turn back early Sunday morning.
I don't know why, but whenever he uses the phrase "without issue," there is always an issue.
"Rats set fire to Mr. Cooper’s store in Fort Valley. No damage done." Columbus (Ga) Enquirer-Sun, October 2, 1880.