This issue can happen if the library opening hours are backwards (e.g.10am-2am) or incorrect (e.g. library set to open at 12am the next day instead of 12pm). Please check the following settings in the OCLC Service Configuration:
If you notice any errors or discrepancies in the open hours, please correct as needed. This includes overlapping entries, which will cause issues if one entry lists open and overlaps with one listing as closed.
If the issue is not with the open hours, please check your Branch Opening Hours Override Settings to ensure that the branches are adhering to the desired open hours.
If you believe the loan policy was applied correctly, and you open hours are correct, please contact OCLC Support with your OCLC Symbol and an example transaction where the due date adjustment was not applied correctly.