Why is Bass Note Late to Change?

Hi,

I seem to observe that having Interpretation present, and set to Bypass, is not necessarily the exact same thing as not having Interpretation present at all.   

By using Bypass I have had some success in limiting my Bass Figure to root note output.

However, the change is happening one note too late, like so:

I've not so far found a way to correct this.

Should this be happening at all?   If so, what causes it and how can I fix it?

Or is there possibly a bug?

Simple test file attached.   

Goal here is to "thump the root" (only) in every case, without any holdovers from the prior chord.    Musically, I can perhaps consider fancying-it-up later  -  after I've got something totally stable that I fully understand!