I've used these two mods before with zero problems but as soon as I updated them both I log into my world and all snow and ice is gone (except for stacked snow) meaning that the top layer of all of the surrounding bodies of water that froze over is also gone as well

I'm not sure how this stuff works so I may be explaining it wrong

Seems like seasons swapped from using its own snow block to the vanilla minecraft:snow, which seems to fix many compatibility issues, but the unregistered blocks are just getting totally stripped out of the world in some cases. Is 2.0 supposed to have save compatibility?

Ah no this is just #109, go use the jar there