There is LibreOffice bug https://bugs.documentfoundation.org/....cgi?id=119044 that seems to be reproducible in openSUSE, but not to be reproducible in Windows or Arch Linux.
Please help to reproduce, confirm and investigate this!

Steps:
1. Download latest LibreOffice RPMs bundle master*_Linux_x86-64_rpm.tar.gz from https://dev-builds.libreoffice.org/d...6-TDF/current/ and extract RPMs
2. Install at least libreofficedev6.3-writer libreofficedev6.3-en-US libreofficedev6.3 packages with their dependencies. To do this from command line with dependencies:

Code:
URL="https://dev-builds.libreoffice.org/daily/master/Linux-rpm_deb-x86_64@86-TDF/current/master~2019-05-04_04.44.35_LibreOfficeDev_6.3.0.0.alpha0_Linux_x86-64_rpm.tar.gz"
TAR="${URL##*/}"
mkdir LibreOffice-master
cd LibreOffice-master
wget "$URL"
tar -xf $TAR
cd ./LibreOfficeDev_*_rpm/RPMS
sudo zypper --no-gpg-checks --non-interactive in --force libreofficedev6.3-writer-6.3.*.rpm libreofficedev6.3-en-US-6.3.*.rpm libreofficedev6.3-6.3.*.rpm libreofficedev6.3-ure-6.3.*.rpm  lodevbasis6.3-core-6.3.*.rpm lodevbasis6.3-en-US-6.3.*.rpm lodevbasis6.3-writer-6.3.*.rpm lodevbasis6.3-images-6.3.*.rpm lodevbasis6.3-*-integration-6.3.*.rpm
Finally open ODT file http://bugs.documentfoundation.org/a....cgi?id=144165 . You can do in by executing:
Code:
/opt/libreofficedev6.3/program/swriter http://bugs.documentfoundation.org/attachment.cgi?id=144165
Capture you screen. Compare your screenshot with https://bug-attachments.documentfoun....cgi?id=151200 and https://bug-attachments.documentfoun....cgi?id=143901

Look if you see
"=" in equation. LibreOffice 6.0 seems to have = symbol, but 6.1 and later versions don't.