Thank you for pointing out this, by default, RedBear DAPLink has been set to auto-reset “ON” by default for firmware uploading, it is not the same as mentions here:
It is not related to the Nordic’s case and also, mbed firmware and the test firmware from RedBear will not affect this behavior. In the mean time, you can try to follow the MSD_COMMANDS.md to set it. RedBear will try to find out the reason as you point out, we hope there is not something missing during the production.
Thanks again and we will get back to you soon.