Thanks for sharing with us on the details and it's good to know the issue has been fixed.
Although we deliver a project based on
practice and experiences from past projects, but every project has different
situations, hereby we implement user pilot stage to discover and fix potential
issues, during the pilot stage of our project, we worked with your team covered
as many scenarios as possible, that is very important for the sanity of
the deployment and I believe there haven’t been too much outstanding issues in
past months. However, to be very frankly, the concurrency of external
user wasn’t included, from a methodology point of view, such hidden
issues normally will be further discovered and fixed during the gradually
production rolling out, either my team or technical support team will
help on this along the way.
Thanks for the understanding and have a nice day!