when replacing pitches without changing rhythms, unable to enter chord on tied note

Steps to reproduce:
1. Create two quarter notes in a measure, and tie them together.
2. Select the first quarter note in the measure.
3. Enter note entry mode, and enable "replace pitches without changing rhythms".
4. Using a MIDI keyboard, play a chord.

Result: Only the second quarter note (on the receiving end of the tie) becomes the chord that was played. The first quarter note becomes only a single note tied into the chord, like this:

...whereas it should look like this:

I am using MuseScore nightly 4eda1f6 on Kubuntu 14.04 64-bit.