This issue has existed since Origin 2019
Select connectivity: MATLAB Console
In MATLAB Command Window, type: "test=10", press enter.
In Origin MATLAB Console dlg, Click Import button,
In MATLAB Import dlg, select test, click Import as Worksheet button.
Check the Matlab imported worksheet.
==>the variable names lost since SCN is on by default. The variable names go into short name of the column in the old version.