Why were there so many 15-16 Episode seasons in Fall 2024 - Winter 2025?

Arifureta, Re:Zero, Danmachi.
This is the first time I've seen the concept 8 episode cours with break in between, so I wasn't sure if it's just a coincidence or there's some common denominator tied to events in the industry.
I am aware that Danmachi experienced delays due to production issues, but what happened with the other two?