A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi RHAFC,
Thanks for writing back and updating the information with us.
Since the problem happens when you are working on specific functions within the add-in, where it works without any problem in Win 11 Intel and the problem happens with Win 11 ARM, I request you report the behavior to the related developing team via submitting the feedback from Excel app. Reference: How do I give feedback on Microsoft Office?
In addition, you can also post your concern in the Microsoft Q & A with tag office-excel-itpro to get any suggestions or help from the experts.
Appreciate your understanding and patience. Have a good day and stay safe!!
Best Regards,