I couldn't get the step assist to work, so I came to look at the code.

The only reference to step assist in this repository seems to have a multiplayer check surrounding it. I think the logic for single player is missing.

src/main/java/com/brandon3055/draconicevolution/common/handler/FMLEventHandler.java#L62-L75

All player movement is handled client side weather your on a dedicated server or the integrated server thats why that code is client side only. I cant really say why it's not working for you but im pretty sure your the only one having this problem because this is the first i have heard of it. If you have the setting enabled the only thing i can think if is some other mod is conflicting with that feature.

Possible conflicting mods are:

• Tinker's Construct
• Ender IO
• Magical Crops

Here's another player with the same complaint: reddit post

I'll make a copy of my world and eliminate mods until it works or I run out of mods.

The conflicting mod is Magical crops.