Player Step Height

In the mod I am making there's a function to make the player bigger (using Pehkui) but I've noticed a bit of an annoying issue with walking around while giant: The player still gets stopped by one block height difference.

I know you can set step height for custom entities, but I haven't found a way to adjust this value for the player. The "set step height of event/target entity" doesn't seem to work on the player either.