If you go through the comments, you will see that the devs talk about an issue with the logic in the for loop, which "may be stopping before it should". Writing a couple of test cases that check whether this is true or not should be trivial.
I'd expect at the very least some type of regression tests to be implemented for every bug that makes into production, to avoid cases like this one where the developers spend weeks figuring out whether their patches even fix the bug in the first place.
I want to work an issue that is open since 2020, but I can only justify dropping all my other work for that if I have enough paying customers interested in some new feature. So, help me get 50 customers to my "all in one" hosting service and I will dedicate a week to it, which should be more than enough time for even a Rust newbie like me to submit a proper PR to that issue. Ok?