I did a brick workout (bike + run) and my watch automatically detected a new FTP but it wasn't propagated to Garmin Connect.
When selecting Reports -> All Activities -> FTP I can see the updated value, but for Reports -> Cycling -> FTP the updated value is missing (thought the graphs where the same). In the mobile app the updated FTP value is also missing because only the Cycling graph is displayed in the app.
Also a new VO2max value was added for running. So far only the first activity (cycling) in a brick workout was used to update values. The 2nd was ignored due to accumulated fatigue from the 1st activity. Did something change?