Since fixing bug 142922, the Basic compatibility function Round implements proper half-to-even rounding mode. That needs documenting in the relevant help page [1], with some examples (see e.g. unit tests implemented in the fix). [1] https://help.libreoffice.org/7.3/en-US/text/sbasic/shared/03170000.html?DbPAR=BASIC
Rafael Lima committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/help/commit/1efde59fa4d731f1fbbb1c14a647acb67d0be27a tdf#143756 Update VBA Round function