So, we have been developing our firmware (for a while now) against a SoftDevice version called 6.0.0-1 alpha. We are getting close to production time, so we wanted to switch to the latest 6.x.x version, and we see that there is a 6.2.1 available on the download tab.
When we install 6.2.1, our firmware stops working -- even though we understand that all 6.x.x's are backwardly compatible. When we put the 6.0.0-1 alpha back, it works again.
When we put 6.2.1 back (it breaks again) and read back the fW version using nRFgo studio, it reports a version number of 7.0.1. (!) If accurate this could explain why our firmware breaks.
This indicates to us that Nordic may have mis-packed their various download files on this downloads tab.
Can you please take a look at this? Thanks.