Created attachment 125515 [details]
Blinking thumbnails of linked images in LibreOffice Impress

Hi!
I'm using Impress 5.1.3.2 and linking more than an image for slide.
In the left column I can see the images thumbnail starting blinking in an alternate fashion between the correct thumbnail and a rectangle with a tiny red text. Usually just the upper slide present in the left column is the one with blinking thumbnails. Obviously this makes LibreOffice Impress harvest a lot of CPU.
To reproduce this you can create a presentation and start inserting two linked images for each slide, adding more slides at some point the thumbnails should start blinking.
See image.
In the image you can notice that also many other thumbnails are broken but at least they're static.



-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (980, 'testing'), (900, 'stable'), (200, 'unstable'), (100, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 4.2.0-1-686-pae (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libreoffice-impress depends on:
ii  dpkg                      1.18.7
ii  libc6                     2.22-9
ii  libetonyek-0.1-1          0.1.6-2
ii  libgcc1                   1:6.1.1-4
ii  libgl1-mesa-glx [libgl1]  11.2.2-1
ii  libglew1.13               1.13.0-2
ii  libglu1-mesa [libglu1]    9.0.0-2.1
ii  libmwaw-0.3-3             0.3.7-1
ii  libodfgen-0.1-1           0.1.6-1
ii  libreoffice-core          1:5.1.3-2
ii  libreoffice-draw          1:5.1.3-2
ii  librevenge-0.0-0          0.0.4-4
ii  libstdc++6                6.1.1-4
ii  libxml2                   2.9.3+dfsg1-1
ii  uno-libs3                 5.1.3-2
ii  ure                       5.1.3-2
ii  zlib1g                    1:1.2.8.dfsg-2+b1

Versions of packages libreoffice-impress recommends:
ii  libreoffice-avmedia-backend-gstreamer  1:5.1.3-2

Versions of packages libreoffice-impress suggests:
ii  bluez  5.36-1+b1

Versions of packages libreoffice-core depends on:
ii  fontconfig                2.11.0-6.4
ii  fonts-opensymbol          2:102.7+LibO5.1.3-2
ii  libboost-date-time1.58.0  1.58.0+dfsg-5+b1
ii  libc6                     2.22-9
ii  libcairo2                 1.14.6-1+b1
ii  libclucene-contribs1v5    2.3.3.4-4.1
ii  libclucene-core1v5        2.3.3.4-4.1
ii  libcmis-0.5-5v5           0.5.1-4
ii  libcups2                  2.1.3-5
ii  libcurl3-gnutls           7.47.0-1
ii  libdbus-1-3               1.10.8-1
ii  libdbus-glib-1-2          0.106-1
ii  libdconf1                 0.26.0-1
ii  libeot0                   0.01-3
ii  libexpat1                 2.1.1-2
ii  libexttextcat-2.0-0       3.4.4-1
ii  libfontconfig1            2.11.0-6.4
ii  libfreetype6              2.6.3-3+b1
ii  libgcc1                   1:6.1.1-4
ii  libgl1-mesa-glx [libgl1]  11.2.2-1
ii  libglew1.13               1.13.0-2
ii  libglib2.0-0              2.48.1-1
ii  libgltf-0.0-0v5           0.0.2-4+b1
ii  libglu1-mesa [libglu1]    9.0.0-2.1
ii  libgraphite2-3            1.3.8-1
ii  libharfbuzz-icu0          1.2.6-2
ii  libharfbuzz0b             1.2.6-2
ii  libhunspell-1.4-0         1.4.1-2
ii  libhyphen0                2.8.8-3
ii  libice6                   2:1.0.9-1+b1
ii  libicu55                  55.1-7
ii  libjpeg62-turbo           1:1.4.2-2
ii  liblangtag1               0.5.7-2
ii  liblcms2-2                2.7-1
ii  libldap-2.4-2             2.4.42+dfsg-2+b2
ii  libmythes-1.2-0           2:1.2.4-1
ii  libneon27-gnutls          0.30.1-3
ii  libnspr4                  2:4.12-2
ii  libnss3                   2:3.23-2
ii  libnss3-1d                2:3.23-2
ii  libodfgen-0.1-1           0.1.6-1
ii  libpcre3                  2:8.38-3.1
ii  libpng16-16               1.6.21-5
ii  librdf0                   1.0.17-1+b1
ii  libreoffice-common        1:5.1.3-2
ii  librevenge-0.0-0          0.0.4-4
ii  libsm6                    2:1.2.2-1+b1
ii  libssl1.0.2               1.0.2h-1
ii  libstdc++6                6.1.1-4
ii  libx11-6                  2:1.6.3-1
ii  libxext6                  2:1.3.3-1
ii  libxinerama1              2:1.1.3-1+b1
ii  libxml2                   2.9.3+dfsg1-1
ii  libxrandr2                2:1.5.0-1
ii  libxrender1               1:0.9.9-2
ii  libxslt1.1                1.1.28-4
ii  uno-libs3                 5.1.3-2
ii  ure                       5.1.3-2
ii  zlib1g                    1:1.2.8.dfsg-2+b1

Versions of packages libreoffice-draw depends on:
ii  dpkg                1.18.7
ii  libavahi-client3    0.6.32~rc+dfsg-1
ii  libavahi-common3    0.6.32~rc+dfsg-1
ii  libc6               2.22-9
ii  libcdr-0.1-1        0.1.2-2
ii  libdbus-1-3         1.10.8-1
ii  libdbus-glib-1-2    0.106-1
ii  libfreehand-0.1-1   0.1.1-1
ii  libgcc1             1:6.1.1-4
ii  libglib2.0-0        2.48.1-1
ii  libicu55            55.1-7
ii  liblcms2-2          2.7-1
ii  libmspub-0.1-1      0.1.2-2+b1
ii  libmwaw-0.3-3       0.3.7-1
ii  libodfgen-0.1-1     0.1.6-1
ii  libpagemaker-0.0-0  0.0.3-1
ii  libreoffice-core    1:5.1.3-2
ii  librevenge-0.0-0    0.0.4-4
ii  libstdc++6          6.1.1-4
ii  libvisio-0.1-1      0.1.5-1
ii  libwpd-0.10-10      0.10.1-1
ii  libwpg-0.3-3        0.3.1-1
ii  libxml2             2.9.3+dfsg1-1
ii  uno-libs3           5.1.3-2
ii  ure                 5.1.3-2
ii  zlib1g              1:1.2.8.dfsg-2+b1