Hi
Today I bought a HRM-Pro and when I connected it to my phone there was an update to version 7.10. I updated but then it still showed that an update for version 7.10 is available. I have checked on my watch (settings -> sensors -> about section shows version 7.10 on my HRM-Pro). Also on the Garmin Connect web page it shows update available and when I click for more info it shows this:
(Current and latest version are the same)
UPDATE [6.1.2021 GMT+1]: Issue seems to be resolved :D