Bizarre context resolution when parent context is block params

[dontgitit]

Sample fiddle: https://jsfiddle.net/wcoshgaL/4/

I have a helper that sets value=omg in context and value=1 in block params. The template correctly renders the value from the block params. Inside that, I call a second helper that sets value=bar in normal context. I would expect value to be bar here since that is in the current context. However, it seems to pull the value out of the parent block param context instead....