2040860 - BODI-1112352 - Error when creating joins with multiple tables - SAP Data Services 4.2

When creating joins between multiple tables in DS Designer 4.2.2, an error is encountered in which a user cannot seem to add another table as a join, but can instead only remove the join. The table intended to be joined appears in the left join of the above row, when it is expected to appear in the right join of the new row. As a result, the user cannot create the intended joins.