[Player, D3D11] FullScreen Switch shows memory leaking

1. What happened

When switching between full-screen and windowed in player Total System Memory Usage can be seen to climb.
Process Explorer also shows this in the Private Bytes metric for Virtual Memory.

2. How we can reproduce it using the example you attached

Run a project in D3D11 and and observe the above.
Please Note: This not occuring in D3D9.

A test was run with 5.34 and the leak was even greater than on 5.4.