Tag percentages can be misleading

For example, I’m looking at an issue that says os.name is 80% of occurrences are tagged with os.name “iOS” and 19% are tagged with os.name “Windows 10”. However, it also says 100% are tagged with device “iPhone”, which seems to imply that a fair number of the reports are from Windows 10 running on iPhone.

It turns out that the Windows 10 reports don’t have an os.name tag at all, so that 100% of reports that have that tag are “iOS”. It seems like it would be clearer for the summary to say os.name is 80% “iOS” and 19% “unspecified” or “unknown” or similar.