In LibreOffice (on LInux), when I type e.g. 'Lan' (including quotes), I get the following:

Something similar happens with many combinations where quoteleft or quoteright is involved.
Looking around in the sources, the following changed solved this issue: deleting the following two lines from the features (only the first line is present in the italic fonts):
markClass quoteleft <anchor 139 500> @top;
markClass quoteright <anchor 138 728> @apostrophe;
In LibreOffice (on LInux), when I type e.g. 'Lan' (including quotes), I get the following:
Something similar happens with many combinations where quoteleft or quoteright is involved.
Looking around in the sources, the following changed solved this issue: deleting the following two lines from the features (only the first line is present in the italic fonts):