Mesa Maven Witnessed maps sometimes seem to bug a little.

I've done a lot of maven witnessed maps this league (500+), this has never happened to me on any other map that I can remember, but in mesa sometimes, I would say about 60% of the times, I kill the boss, after entering the boss room, kill it and get the notification for mavened map completion, but realize that the maven has not yet spawned any more bosses, most of the times after quitting the map, so I have to go back into it, leave the boss area, and go around it trying to find and get as close as possible to the maven and only than does she spawn the bosses. I believe this has something to do with the maven being too far away in the boss area, placing her in the middle would probably fix the issue and this is probably the reason it doesn't happen 100% of the times, that being because sometimes she spawns closer do the middle of the boss area, depending on the layout of the map.

bug ref number or video prove?