Meetups: Unrealistic speeds up climbs

I’ve created a couple of meetups over the past two weeks. I’ve noticed when i’m climbing up grades of 5% and over, my speed and that of other riders are ridiculously fast, like 40km/h and faster while my watts per kilo is between 3-4w/kg. Then on descents, my speed sometimes barely reaches 30km/h. It’s almost like my rider weight is reset to 40kg, or something like this.

Can this be looked into?

A post was merged into an existing topic: Meetup Speeds Incorrect with Small Groups