Nope, I brought this up in other No Go Zone thread, 12" Margin on NGZs - #15 by balmerjd . Before the most recent app update, you could make circular template NGZ down to a 1ft radius. After the update you can’t go below 1.7, though oddly a couple times after a lot of initial repeats trying to force it to go smaller, I did get a 1.6 a couple of times. But on the next attempt to make it smaller, it reverted to 1.7.
Sure smells like a software bug to me.