I asked for the specific Virtuoso version details as specified in the link, as virtuoso-opensource-7.2.4.2 doesn’t mean much other than you seem to be running a relatively old version from back in 2016. In which case the recommendation would be to upgrade to the latest Virtuoso 7.2.13 release from Jun 2024, the Windows installer for which is available from Virtuoso_Open_Source_for_Windows.exe and see if the problem persists.