Importing steps from different devices - priority?

I'm using my scanwatch for everyday step tracking. However, some activities cannot be detected correctly (when I use my treadmill at work or when pushing a stroller etc.) so I use my smartphone in my pocket for that. Both step counters are connected through Health Connect and when I look at the total count there it seems plausible. However - the withings app barely seems to take note of the other step counter. It prefers the (wrong) numbers from my watch. Only when I take off the watch and use only my phone, these steps seem to get imported correctly. Can I somehow change that? Any ideas? Thank you!