I went in the game again, after all. It's late over here, but I wanted to be certain. Good news: It's not endless!
My Strangerville guy placed two baby turtle hatchers on his homelot around nine-ish in the morning:
https://abload.de/img/04.07.19_05-16-28plja6.jpg
https://abload.de/img/04.07.19_05-18-12ask0h.jpg
The baby turtles sink into the ground shortly before the pool and re-emerge after they've passed the threshold. I believe this can be worked around/concealed a bit, but I'm a terrible builder, so I'll leave that to you.
https://abload.de/img/04.07.19_05-16-41ezjgm.jpg
https://abload.de/img/04.07.19_05-15-5373kjr.jpg
In the afternoon my sim got asked by a friend whether he could drop by. When the guest arrived I showed him the pool and he took a selfie - by this time there are still turtles hatching.
https://abload.de/img/04.07.19_05-19-434tkr4.jpg
When the sims entered the pool, I noticed that no more turtles were hatching. That was between 16:00 and 17:00.
The blue banners have become non-functional. I cannot click on them anymore.
Exited without saving again.
