VOYEUR: black screen after selecting a window if a still image is to be shown

[Bakhtosh]

ScummVM versions:
Win32 developer: 1.10.0git3377-g9583083c73 (June 3 2017 10:42:34)
Win32 stable: 1.9.02 (Oct 18 2016 23:58:50)

Language of game: english / Version of game: DOS-CD
Test system: Windows 10 64 bit

Problem appears every time I select a window that has a magnifier mouseover.

In these cases a still image is supposed to be shown. But instead I only get a black screen (GUI elements are also missing). The mouse cusor still works and highlights hotspots on mouseover. If I click while a hotspot is indicated suddenly the still image with the closeup of the hotspot object appears. If I then do a righclick the closeup is closed but the still image is still there.

It doesn't matter if I've looked at a window that triggered a video before or if I've left and reentered the house manor closeup before.

This problem is not present if I play the same version using DOSBox.
I'll try to attach two videos for comparison (a DOSBox one without the problem and a ScummVM one with the problem).

Sidenote: I chose component 'Engine: Gob' because that was the case for all previous Voyeur bugs.

[Bakhtosh]

Links of the comparison videos:
​http://bakhtosh.bplaced.net/Voy_Bug_Videos/Voyeur_DOSBox.mkv
​http://bakhtosh.bplaced.net/Voy_Bug_Videos/Voyeur_ScummVM.mkv