We are trying to analyze how many of our users have upgraded from 17.4 (which has a major issue in compatibility with our app) to 17.5 (in which the issue does not happen).
When we use the metrics in App Store Connect, the version 17.5 does not appear in the Platform version list at all.
When we look at overall sessions, we see there are about 80 today. But when we display By Platform Version, we only see 4. I surmise that we should be seeing many sessions on 17.5 but those are being hidden because of this issue.