Flagged Ride?

I’m 1-2 weeks out from a gran fondo type ride I’ve been training for. I did a longer test ride a couple days ago that was ~140km + ~1300m ele/climb. When it uploaded to xert, it got flagged as “invalid”. I unflagged it and am proceeding forward as normal (overall feeling pretty good about the upcoming ride). Just want to know why the activity initially got the flag from xert? What are the criteria?

Have you inspected the activity chart for anything unusual in each of the data sets?

Nothing really looks off to me except a couple gaps in my HR data. There’s no power data for the ride. There’s a 66kph speed spike from a descent which is a data outlier. The total XSS is significantly higher than other activities, but it’s appropriate for and matches the ride. Thanks for the link. Maybe it’s just that this is the longest ride I’ve uploaded and it doesn’t compare to the rest of the activities.