See the test case to the report #1883425. If after a first attempt to open a segment, I opt to expand the segment, segmentation stops over the second part of the abbreviation, thus the segment ending with “e.g.”. Normally, this should be avoided. I see two ways of coping with the problem:
a) either to have list(s) of abbreviations for languages, or
b) simply not to break a segment, if a point is followed by a minuscule letter (for Latin/Cyrillic/Greek scripts, at least).