Checking "Show first" with an interval of 1 for measure numbers under Style->General... only shows measure number 1.
In any MuseScore score open Style->General->Header,Footer,Numbers.
In the Measure Numbers section
- Check Measure numbers
- Check Show first
- set Interval to 1
Results are that only measure 1 is numbered. Show first in this case is a redundant option (that is not necessary when interval is set to 1).
Expected result, all measures should be numbered
The Show first option needs to be ignored when the interval is set to 1.