My son and I play on our own server. Downloaded and setup new server yesterday (September 10 2020). We log on today to play, about 80% of all rain forests are dead. The grassland areas have about 10 - 20% death of all plants. Only thing we changed on server was the size, whitelisting ourselves as admins, meteor set to 999 days and skill level rate increase. Everything else is default. Is this expected? There is zero pollution, heck, I'm still just on wood no stone yet.
I am going to back up and save the server and create a new one. I can provide more details if needed, I'm not sure what should be provided.
PS. Played on 8.0 for about 100 days straight (we set meteor to 999). We had zero issues of plant death on that server, with the exception of pollution as expected though.