Did some AI teammate games on PTR. On Tomb Of The Spider Queen, the ai bots absolutely hate to pay in their gems. They’ll start to pay, then distract themselves at 20% and wander off. And with no enemy interference anywhere nearby.
They’ll happily build up 120+ gems without deciding to pay.
(I think this is different from some AI behavior on live, where they’ll interrupt their payment but stay nearby and try again immediately)