MPA reduction not synchronised

During a ride with Xert MPA on my Garmin 1000 it stated I was bringing my MPA down to beneath my FTP and therefore getting a medal showing for doing this. However, when I get home and upload the ride/ review it in Xertonline, the MPA level is not the same and often much higher than what was stated on the ride (MPA and FTP not even close to touching). Can you advise if this is some form of discrepancy or if I’m reading things wrongly?

Be sure that the Xert Code is being properly recognized by the app(s). See the comments in the adjacent post.