Yes, the fit is ok. It is working for about 15 seconds after starting an activity and then it stops.
In that case, it's better to report this to the product forum since it doesn't sound like it's a Connect IQ issue: https://forums.garmin.com/sports-fitness/healthandwellness/f/venu-2
It happens randomly, to any activity recording. It happened to me while walking and while cycling.
Is this related to Connect IQ app use, or just any activity recording?