Thank you for the answer, however the provided link does not show the information we are looking for. It just show the Maxwell equation, not how it is implemented in ANSYS Maxwell, and does not tell what is the gauge used.
A second question is the following: Are aware of these local errors in corners due to the formulation used? Do you have any information, internal documents or publications, related to them?
These errors for the T-Omega formulation are described in this publication: