eeschema block rotation does not rotate correctly/consinstently wires

wire is not rotated correctly in some situations (as when a part of the schematic is block selected).

-single segment/wire: is not rotated
To reproduce:
  draw a single wire segment, select it, press R to rotate: it does not rotate neither selecting it with a block operation nor using a single click.

-segment connected to a testpoint
To reproduce:
  place a testpoint, connect a wire (single segment)
  Block select the testpoint with the wire
  press R to rotate. The testpoint is rotated, the wire is not.

-segment connected to two testpoints
  place two testpoints, connect using a wire
  Rotate with R. Sometimes rotation is correct, some the wire is disconnected and only the symbols are rotated, some other the wire is connected "diagonally" in a strange way.

Cheers,
Dino.

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Tested on revision
27d097a78c7340d9ddebb4acc00c2b283441031c

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Application: Eeschema
Version: (5.1.0-756-g27d097a78), debug build
Libraries:
    wxWidgets 3.0.2
    libcurl/7.52.1 OpenSSL/1.0.2r zlib/1.2.8 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) libssh2/1.7.0 nghttp2/1.18.1 librtmp/2.3
Platform: Linux 4.9.0-8-amd64 x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8) GTK+ 2.24
    Boost: 1.69.0
    OpenCASCADE Community Edition: 6.8.0
    Curl: 7.52.1
    Compiler: GCC 6.3.0 with C++ ABI 1010

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=OFF
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON