Comment by achierius

Essentially all Apple engineers use macOS ~exclusively (at least in the SWE org). That these bugs persist is in spite of that fact.

Frankly there's just a lot going on, and between all the kinds of bugs that have higher priority -- crashers, panics, memory regressions (your app gets Jetsam'd), power bugs (your phone runs out of battery mid-day), perf regressions (could violate EU regulations against planned obsolescence), security bugs (people can lose their money, journalists can get killed) -- bugs like this often fall by the wayside for quite some time until they're fixed.