As much I love Winter Mode it seems to break things, not sure how or why but here’s some observations about what tends to happen. Spoiler warning for those that have not finished Story Mode.
During the 2024 Halloween event when turning on Snow Mode briefly the Jack o’ Lantern I the water hole next to the lake disappears, yet the one in the well stays perfectly fine. Durning Criken’s playthrough the Safe wasn’t where it was supposed to be, and for some reason was flung near Tr 1 and the Teleport log. Yet when I killed a pig the meat piles during Christmas Event, the meat pile remained while rocks, scrap, and meat chunks fell back into the water. What’s been theorized between me and some other is that items get launched out of the water when turning on Snow mode.
While the other main observation is Kerfurs and creatures, such as wisps and boars, tend get stuck in water a lot which was also theorized something about how Snow Mode affected pathing. Notable places they get stuck in river near bridge right next to the base, Kerfur heading towards Xray seems get stuck in river, somewhere between Xray and Quebec, even though they can easily move out of the river so not prevented by Terrain this time. One point when I headed towards the little island in lake near Oscar by Kerfurs were unable follow me up there, even though previously they had no problem yet turning on Snow mode they were able cross the water. Might be something similar to how entities were getting stuck on the ice during Christmas event.