Modpack version
0.3.11 (updated from 0.3.8)

Describe the bug
As title; No blocks has been changed, biome boundaries are seem to be as before, but the biome names and grass colors are different
My base was in Prairie biome before the update, now it is in Orchard; Any type of "Clearing" biome seem to have became Polluted Lake; etc.
Unlike #1105 compass works correctly (ie, it points to the changed biome)

Screenshots
Before:

After:

Thanks for the report. I can't reproduce this, it didn't happen in any of my test worlds :/ But one such issue has been present in Forge, it was only very recently fixed.

Did you add any mods to the pack?

:concern:
This should have been fixed in 36.0.2.
Do you have a backup of your world pre-swap, and can you upload it to mega or google drive or something for further investigation?

Did you add any mods to the pack?

I added AE2, then removed it after

Do you have a backup of your world pre-swap, and can you upload it to mega or google drive or something for further investigation?

https://mega.nz/file/CmQDyKjB#MMR7o2SrU35AQSDClExsPBNRyUEk8okDRKCNbLBIdZU
I made this save in 0.3.5, might be old save weirdness

This should have been fixed in 36.0.2.

I'll try updating forge, because I forgot to do that when I updated that save

How are you downloading/updating the modpack? The CurseForge App updates Forge for you :)

I use multiMC, so I have to manually update

I don't think updating Forge now will fix your biomes, you will most likely also have to load the backup before updating, just so you know :)

I don't think updating Forge now will fix your biomes

No, it didn't :(

Any update on this? Did the backup + Forge update work?

Nope, tried forge 36.0.10 and 36.0.13 on E6 0.3.13, both didn't fixed that

• With the backup?

yep

Hm I'm sorry to hear that :/ I'm afraid there's not much I can do tbh.