14.6.0 -> 14.7.5 Don't mix AC3 audio track to 1.0.0+LFE (mono)

14.6.0 -> 14.7.5 Don't mix AC3 audio track to 1.0.0+LFE (mono)
Such films has no voice.
Potplayer check passed. 1.0.0+LFE output working good.
It is necessary in difficult schemes of a conclusion of a sound via the mixer panel with a mono-input

Hard/Soft config:
Mainboard: Gigabyte GA-H110M-H (rev.1.0) Realtek Audio (driver 6.0.1.8586)
OS: Windows 10-64 (ver. 1809)

Actions with K-Lite Mega codec packs:
Uninstall -> Reboot -> Install again with default settings
14.6.0, 14.6.5, 14.7.0, 14.7.5
Recently in the past everything worked good with K-Lite

LAV Audio decoder settings > uncheck "Expand Mono to Stereo"

Did not help

Codec Tweak Tool > Audio Output > Same as input

That will disable mixing.

The scheme of Realtek speakers does not have been less than Stereo (2.0). And mix in the computer nevertheless is required. That same went to both channels Realtek 2.0 stereo.
AC3 (5.1; 6.1; 7.1) and over schemes -> 1.0.0+LFE mixing -> 2.0 Realtek.
I have been testing all combinations of settings LAV Audio mixer. And did not find the necessary combination

You can bypass the Windows mixer by using WASAPI exclusive mode.

MPC-HC options > Playback > Output > Audio Renderer > Internal Audio Renderer
MPC-HC options > Internal Filters > Audio Renderer > Exclusive mode